{"id":1019,"date":"2021-10-08T13:02:34","date_gmt":"2021-10-08T13:02:34","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=1019"},"modified":"2021-10-14T22:12:10","modified_gmt":"2021-10-14T15:12:10","slug":"anh-cua-mot-vat-tao-boi-guong-phang-co-dac-diem-gi-kien-thuc-ly-7","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/anh-cua-mot-vat-tao-boi-guong-phang-co-dac-diem-gi-kien-thuc-ly-7\/","title":{"rendered":"\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng c\u00f3 \u0111\u1eb7c \u0111i\u1ec3m g\u00ec? Ki\u1ebfn th\u1ee9c l\u00fd 7"},"content":{"rendered":"\n<script type=\"text\/javascript\">\nimg_numb = 10;\n<\/script>\n\n\n\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng - B\u00e0i 5 - V\u1eadt l\u00ed 7 - C\u00f4 Ph\u1ea1m Th\u1ecb H\u1eb1ng (HAY NH\u1ea4T)\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/4CY8ucWrucg?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption>B\u00e0i gi\u1ea3ng \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi v\u1eadt l\u00fd h\u1ecdc l\u1edbp 7, quang h\u1ecdc l\u00e0 m\u1ed9t trong nh\u1eefng ch\u01b0\u01a1ng v\u00f4 c\u00f9ng quan tr\u1ecdng. Hi\u1ec3u \u0111\u01b0\u1ee3c v\u1ec1 nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y s\u1ebd gi\u00fap c\u00e1c em m\u1edf mang t\u1ea7m hi\u1ec3u bi\u1ebft h\u01a1n r\u1ea5t nhi\u1ec1u. Do \u0111\u00f3, h\u00e3y c\u00f9ng ch\u00fang t\u00f4i t\u00ecm hi\u1ec3u ngay v\u1ec1 \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng. Ngo\u00e0i ra so s\u00e1nh v\u1edbi \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi nh\u1eefng g\u01b0\u01a1ng kh\u00e1c n\u1eefa. Ch\u1eafc ch\u1eafn nh\u1eefng ki\u1ebfn th\u1ee9c m\u00e0 ch\u00fang t\u00f4i mang \u0111\u1ebfn s\u1ebd l\u00e0m cho b\u1ea1n th\u1ea5y th\u00edch th\u00fa. C\u00f9ng b\u1eaft \u0111\u1ea7u ngay th\u00f4i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u1ef1c t\u1ebf v\u1ec1 \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u01b0\u01a1ng ph\u1eb3ng l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u v\u1ec1 \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng, c\u00e1c em n\u00ean bi\u1ebft tr\u01b0\u1edbc v\u1ec1 g\u01b0\u01a1ng ph\u1eb3ng. Theo \u0111\u1ecbnh ngh\u0129a, g\u01b0\u01a1ng ph\u1eb3ng l\u00e0 g\u01b0\u01a1ng c\u00f3 b\u1ec1 m\u1eb7t ph\u1ea3n xa. \u0110\u00e2y l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a m\u1eb7t ph\u1eb3ng, v\u00e0 ch\u00fang c\u00f3 t\u00e1c d\u1ee5ng ph\u1ea3n chi\u1ebfu l\u1ea1i \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c truy\u1ec1n t\u1edbi.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi nh\u1eefng lo\u1ea1i g\u01b0\u01a1ng kh\u00e1c, g\u01b0\u01a1ng ph\u1eb3ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i nh\u1ea5t. B\u1ea1n c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng b\u1eaft g\u1eb7p g\u01b0\u01a1ng ph\u1eb3ng \u1edf nhi\u1ec1u n\u01a1i kh\u00e1c nhau. Kh\u00f4ng ch\u1ec9 trong gia \u0111\u00ecnh m\u1ed7i ng\u01b0\u1eddi, g\u01b0\u01a1ng c\u00f2n \u0111\u01b0\u1ee3c d\u1ef1ng nhi\u1ec1u \u1edf nh\u1eefng c\u1eeda h\u00e0ng kh\u00e1c. V\u00ed d\u1ee5 nh\u01b0: c\u1eeda h\u00e0ng qu\u1ea7n \u00e1o, c\u1eeda h\u00e0ng trang s\u1ee9c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, g\u01b0\u01a1ng \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng \u0111\u1ec3 t\u1ea1o n\u00ean nh\u1eefng b\u1ed9 ph\u1eadn \u1edf trong k\u00ednh hi\u1ec3n vi, k\u00ednh nha khoa, \u1ed1ng nh\u00f2m, k\u00ednh thi\u00ean v\u0103n\u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ecbnh ngh\u0129a v\u1ec1 \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong quang h\u1ecdc, \u0111\u1eb7c bi\u1ec7t l\u0129nh v\u1ef1c quang h\u00ecnh, \u1ea3nh \u1ea3o xu\u1ea5t hi\u1ec7n nhi\u1ec1u l\u1ea7n. \u0110\u00e2y l\u00e0 thu\u1eadt ng\u1eef ch\u1ec9 nh\u1eefng h\u00ecnh \u1ea3nh quan s\u00e1t khi th\u1ea5y c\u00e1c quang tuy\u1ebfn \u00e1nh s\u00e1ng. Ngo\u00e0i ra nh\u1eefng h\u00ecnh \u1ea3nh quan s\u00e1t qua c\u00e1c b\u1ee9c x\u1ea1 \u0111i\u1ec7n t\u1eeb. C\u00f3 th\u1ec3 n\u00f3i ch\u00fang c\u00f9ng \u0111i ra t\u1eeb n\u01a1i n\u00e0o \u0111\u00f3 m\u00e0 tr\u00ean th\u1ef1c t\u1ebf th\u00ec \u0111\u01b0\u1eddng \u0111i c\u1ee7a quang tuy\u1ebfn s\u1ebd kh\u00f4ng \u0111i qua c\u00e1c \u0111i\u1ec3m \u1edf tr\u00ean h\u00ecnh \u1ea3o n\u00e0y.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"687\" height=\"457\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/Snap85-1.jpg\" alt=\"\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng\" class=\"wp-image-2258\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap85-1.jpg 687w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap85-1-300x200.jpg 300w\" sizes=\"(max-width: 687px) 100vw, 687px\" \/><figcaption>\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t c\u1ee7a \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ed1i v\u1edbi t\u00ednh ch\u1ea5t \u1ea3nh c\u1ee7a v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng, b\u1ea1n c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng ch\u00fang c\u00f3 kh\u00e1 nhi\u1ec1u t\u00ednh ch\u1ea5t. Th\u1ebf nh\u01b0ng nh\u1eefng t\u00ednh ch\u1ea5t n\u00e0y \u0111\u1ec1u \u0111\u01b0\u1ee3c h\u1ec7 th\u1ed1ng l\u1ea1i v\u00f4 c\u00f9ng r\u00f5 r\u00e0ng. H\u01a1n n\u1eefa ch\u00fang c\u00f3 li\u00ean quan \u0111\u1ebfn nhau. Th\u1ebf n\u00ean b\u1ea1n s\u1ebd th\u1ea5y r\u1eb1ng ch\u00fang kh\u00f4ng kh\u00f3 \u0111\u1ec3 ghi nh\u1edb.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u00ed d\u1ee5 b\u00e0i l\u00e0m v\u1ec1 \u1ea3nh c\u1ee7a v\u1eadt qua g\u01b0\u01a1ng<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>  Khi c\u00f3 v\u1eadt \u0111\u1ee9ng tr\u01b0\u1edbc g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng s\u1ebd cho ta m\u1ed9t \u1ea3nh \u1ea3o. \u1ea2nh \u1ea3o n\u00e0y s\u1ebd c\u00f3 \u0111\u1ed9 l\u1edbn b\u1eb1ng v\u1eadt.\n\n  Kho\u1ea3ng c\u00e1ch t\u1eeb v\u1eadt \u0111\u1ebfn g\u01b0\u01a1ng ch\u00ednh b\u1eb1ng kho\u1ea3ng c\u00e1ch t\u1eeb \u1ea3nh \u0111\u1ebfn g\u01b0\u01a1ng. C\u00f3 th\u1ec3 hi\u1ec3u r\u1eb1ng: \u1ea3nh v\u00e0 v\u1eadt \u0111\u1ed1i x\u1ee9ng v\u1edbi nhau qua g\u01b0\u01a1ng.\n\n  M\u00e0n ch\u1eafn kh\u00f4ng th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c \u1ea3nh \u1ea3o.\n\n  X\u00e9t hai v\u1eadt c\u00f9ng \u0111\u1ee9ng \u1edf tr\u01b0\u1edbc g\u01b0\u01a1ng. V\u1eadt n\u00e0o \u0111\u1ee9ng \u1edf xa g\u01b0\u01a1ng h\u01a1n th\u00ec \u1ea3nh c\u1ee7a v\u1eadt \u0111\u00f3 s\u1ebd nh\u1ecf h\u01a1n so v\u1edbi \u1ea3nh t\u1ea1o b\u1edfi v\u1eadt kia.\n\n  \u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ch\u00ednh l\u00e0 h\u00ecnh c\u1ee7a m\u1ed9t v\u1eadt quan s\u00e1t \u0111\u01b0\u1ee3c \u1edf trong g\u01b0\u01a1ng.<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">L\u01b0u \u00fd nh\u1ecf: \u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt ch\u00ednh l\u00e0 t\u1eadp h\u1ee3p c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c \u0111i\u1ec3m n\u1eb1m tr\u00ean v\u1eadt \u0111\u00f3. Ngo\u00e0i ra, c\u00e1c tia s\u00e1ng t\u1eeb \u0111i\u1ec3m S t\u1edbi g\u01b0\u01a1ng ph\u1eb3ng s\u1ebd cho tia ph\u1ea3n x\u1ea1. Tia ph\u1ea3n x\u1ea1 n\u00e0y s\u1ebd c\u00f3 \u0111\u01b0\u1eddng k\u00e9o d\u00e0i \u0111i qua \u1ea3nh \u1ea3o l\u00e0 S\u2019.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">So s\u00e1nh \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng v\u1edbi c\u00e1c lo\u1ea1i g\u01b0\u01a1ng kh\u00e1c<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eafc \u0111\u1ebfn \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng, ng\u01b0\u1eddi ta th\u01b0\u1eddng so s\u00e1nh v\u1edbi c\u1ea3 nh\u1eefng lo\u1ea1i g\u01b0\u01a1ng kh\u00e1c. C\u00f3 t\u1ea5t c\u1ea3 3 lo\u1ea1i g\u01b0\u01a1ng. \u0110\u00f3 l\u00e0: g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng c\u1ea7u l\u1ed3i, g\u01b0\u01a1ng c\u1ea7u l\u00f5m. C\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng nh\u1eadn th\u1ea5y r\u1eb1ng:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>  \u1ea2nh \u1ea3o c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng v\u1edbi v\u1eadt khi \u0111i qua g\u01b0\u01a1ng ph\u1eb3ng\n\n  \u1ea2nh \u1ea3o c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n v\u1eadt khi \u0111i qua g\u01b0\u01a1ng c\u1ea7u l\u1ed3i\n\n  \u1ea2nh \u1ea3o c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n v\u1eadt khi \u0111i qua g\u01b0\u01a1ng c\u1ea7u l\u00f5m<\/code><\/pre>\n\n\n\n<p class=\"wp-block-paragraph\">H\u01b0\u1edbng d\u1eabn gi\u1ea3i b\u00e0i t\u1eadp v\u1eadt l\u00fd v\u1ec1 \u1ea3nh qua g\u01b0\u01a1ng ph\u1eb3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1eadt l\u00fd v\u1ec1 \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng. Theo nh\u1eadn \u0111\u1ecbnh c\u1ee7a ch\u00fang t\u00f4i, nh\u1eefng b\u00e0i t\u1eadp n\u00e0y kh\u00f4ng qu\u00e1 kh\u00f3. Tuy nhi\u00ean ch\u00fang t\u00f4i v\u1eabn g\u1eafn k\u00e8m c\u1ea3 gi\u1ea3i b\u00e0i t\u1eadp v\u1eadt l\u00fd 7 b\u00e0i 5 k\u00e8m v\u1edbi c\u00e2u h\u1ecfi. Tin r\u1eb1ng nh\u1eefng th\u00f4ng tin m\u00e0 ch\u00fang t\u00f4i mang \u0111\u1ebfn s\u1ebd gi\u00fap c\u00e1c em <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> gi\u1ea3i b\u00e0i t\u1eadp d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp v\u1ebd h\u00ecnh qua g\u01b0\u01a1ng n\u00e2ng cao<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 1: Ch\u1ecdn ph\u00e1t bi\u1ec3u \u0111\u00fang trong c\u00e1c ph\u00e1t bi\u1ec3u sau \u0111\u00e2y:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A \u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c t\u1ea1o qua g\u01b0\u01a1ng ph\u1eb3ng s\u1ebd lu\u00f4n c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n v\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B \u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng c\u00f3 th\u1ec3 l\u1edbn h\u01a1n v\u1eadt. \u0110i\u1ec1u n\u00e0y t\u00f9y thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed \u0111\u1eb7t v\u1eadt \u1edf tr\u01b0\u1edbc g\u01b0\u01a1ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C N\u1ebfu nh\u01b0 \u0111\u1eb7t m\u00e0n \u1edf m\u1ed9t v\u1ecb tr\u00ed th\u00edch h\u1ee3p, v\u1eadt \u0111\u1eb7t \u1edf tr\u01b0\u1edbc g\u01b0\u01a1ng, ta c\u00f3 th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c \u1ea3nh. \u1ea2nh n\u00e0y l\u00e0 \u1ea3nh c\u1ee7a v\u1eadt v\u00e0 t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D \u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng s\u1ebd lu\u00f4n c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng v\u1edbi v\u1eadt.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 2: Ta nh\u00ecn th\u1ea5y \u1ea3nh S\u2019 \u0111\u01b0\u1ee3c t\u1ea1o b\u1edfi m\u1ed9t \u0111i\u1ec3m s\u00e1ng S \u0111\u1eb7t \u1edf tr\u01b0\u1edbc g\u01b0\u01a1ng ph\u1eb3ng khi n\u00e0o?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Khi m\u00e0 \u1ea3nh S\u2019 \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf ph\u00eda tr\u01b0\u1edbc c\u1ee7a m\u1eaft ch\u00fang ta<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B Khi m\u00e0 S\u2019 \u0111\u01b0\u1ee3c chuy\u1ec3n th\u00e0nh ngu\u1ed3n s\u00e1ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C Khi m\u00e0 gi\u1eefa m\u1eaft v\u00e0 \u1ea3nh S\u2019 kh\u00f4ng t\u1ed3n t\u1ea1i v\u1eadt \u0111\u1ec3 ch\u1eafn s\u00e1ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D Khi m\u00e0 m\u1eaft nh\u1eadn \u0111\u01b0\u1ee3c tia ph\u1ea3n x\u1ea1 t\u1edbi t\u1eeb c\u00e1c tia t\u1edbi, v\u00e0 xu\u1ea5t ph\u00e1t t\u1eeb \u0111i\u1ec3m s\u00e1ng S.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 3: V\u00ec sao ta c\u00f3 th\u1ec3 \u0111\u1eb7t m\u00e0n h\u1ee9ng \u1ea3nh t\u1ea1i v\u1ecb tr\u00ed \u1ea3nh \u1ea3o S\u2019 c\u1ee7a \u0111i\u1ec3m s\u00e1ng S \u0111\u01b0\u1ee3c t\u1ea1o ra b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng m\u00e0 kh\u00f4ng th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c \u1ea3nh \u1edf tr\u00ean m\u00e0n?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A B\u1edfi v\u00ec \u1ea3nh \u1ea3o l\u00e0 ngu\u1ed3n s\u00e1ng, n\u00ean ta kh\u00f4ng th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B B\u1edfi v\u00ec ch\u00f9m tia ph\u1ea3n x\u1ea1 l\u00e0 ch\u00f9m tia ph\u00e2n k\u1ef3. Th\u1ebf n\u00ean ch\u00fang kh\u00f4ng th\u1ec3 h\u1ed9i t\u1ee5 \u0111\u01b0\u1ee3c \u1edf tr\u00ean m\u00e0n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C B\u1edfi v\u00ec \u1ea3nh \u1ea3o l\u00e0 v\u1eadt s\u00e1ng, n\u00ean ta kh\u00f4ng th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D B\u1edfi v\u00ec kho\u1ea3ng c\u00e1ch t\u1eeb \u1ea3nh \u0111\u1ebfn g\u01b0\u01a1ng b\u1eb1ng kho\u1ea3ng c\u00e1ch t\u1eeb v\u1eadt \u0111\u1ebfn g\u01b0\u01a1ng. Th\u1ebf n\u00ean ta kh\u00f4ng th\u1ec3 h\u1ee9ng \u0111\u01b0\u1ee3c \u1ea3nh \u1edf tr\u00ean m\u00e0n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 4, Ch\u1ecdn ph\u00e1t bi\u1ec3u sai trong c\u00e1c ph\u00e1t bi\u1ec3u sau \u0111\u00e2y:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A \u1ea2nh \u1ea3o t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng s\u1ebd c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng v\u1edbi v\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B \u1ea2nh \u1ea3o t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i s\u1ebd c\u00f3 k\u00edch th\u01b0\u1edbc nh\u1ecf h\u01a1n v\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C \u1ea2nh \u1ea3o t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u00f5m s\u1ebd c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n v\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D \u1ea2nh \u1ea3o t\u1ea1o b\u1edfi ba lo\u1ea1i g\u01b0\u01a1ng s\u1ebd c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3i b\u00e0i t\u1eadp chi ti\u1ebft v\u1edbi l\u1eddi gi\u1ea3i th\u00edch<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1ef1a v\u00e0o nh\u1eefng g\u00ec \u0111\u00e3 h\u1ecdc t\u1eeb \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng, <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng tr\u1ea3 l\u1eddi \u0111\u01b0\u1ee3c nh\u1eefng b\u00e0i t\u1eadp n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 1, \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng s\u1ebd kh\u00f4ng h\u1ee9ng \u0111\u01b0\u1ee3c \u1edf tr\u00ean m\u00e0n ch\u1eafn. B\u1edfi th\u1ebf \u0111\u00e1p \u00e1n C l\u00e0 sai<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ea2nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng c\u00f3 k\u00edch th\u01b0\u1edbc b\u1eb1ng v\u1edbi v\u1eadt. Do \u0111\u00f3 \u0111\u00e1p \u00e1n A, B l\u00e0 \u0111\u00e1p \u00e1n sai, c\u00f2n \u0111\u00e1p \u00e1n D \u0111\u00fang.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 2, \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 D<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u1ec3 c\u00f3 th\u1ec3 nh\u00ecn \u0111\u01b0\u1ee3c v\u1eadt, tia s\u00e1ng t\u1eeb v\u1eadt ph\u00e1t ra ph\u1ea3i \u0111i \u0111\u1ebfn m\u1eaft ng\u01b0\u1eddi. Th\u1ebf n\u00ean, \u0111\u1ec3 c\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y \u1ea3nh c\u1ee7a v\u1eadt qua g\u01b0\u01a1ng, m\u1eaft s\u1ebd ph\u1ea3i nh\u1eadn \u0111\u01b0\u1ee3c tia ph\u1ea3n x\u1ea1. Nh\u1eefng tia n\u00e0y s\u1ebd xu\u1ea5t ph\u00e1t t\u1eeb \u0111i\u1ec3m s\u00e1ng S.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 3, \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 B<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ea2nh \u1ea3o S\u2019 c\u1ee7a \u0111i\u1ec3m s\u00e1ng S s\u1ebd do g\u01b0\u01a1ng ph\u1eb3ng t\u1ea1o ra. Ch\u00fang l\u00e0 giao \u0111i\u1ec3m c\u1ee7a \u0111\u01b0\u1eddng k\u00e9o d\u00e0i xu\u1ea5t ph\u00e1t t\u1eeb c\u00e1c tia s\u00e1ng ph\u1ea3n x\u1ea1 \u1edf tr\u00ean g\u01b0\u01a1ng. Khi ta \u0111\u1eb7t m\u00e0n h\u1ee9ng \u1ea3nh \u1edf v\u1ecb tr\u00ed \u1ea3nh \u1ea3o S\u2019 c\u1ee7a \u0111i\u1ec3m s\u00e1ng S, ta s\u1ebd kh\u00f4ng h\u1ee9ng \u0111\u01b0\u1ee3c \u1ea3nh \u1edf tr\u00ean m\u00e0n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 4, \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 D<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea3 3 \u0111\u00e1p \u00e1n A, B, C \u0111\u1ec1u \u0111\u00e3 \u0111\u01b0\u1ee3c n\u00eau ra \u1edf tr\u00ean b\u00e0i h\u1ecdc. Do \u0111\u00f3 \u0111\u1ea5y l\u00e0 nh\u1eefng \u0111\u00e1p \u00e1n \u0111\u00fang. V\u1edbi t\u00ednh ch\u1ea5t r\u00f5 r\u1ec7t nh\u01b0 v\u1eady, s\u1ebd kh\u00f4ng c\u00f3 chuy\u1ec7n ba \u1ea3nh \u1ea3o n\u00e0y t\u1eeb m\u1ed9t v\u1eadt qua ba chi\u1ebfc g\u01b0\u01a1ng b\u1eb1ng nhau.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"683\" height=\"346\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/image_2021-10-13_220826.png\" alt=\"\" class=\"wp-image-2259\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/image_2021-10-13_220826.png 683w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/image_2021-10-13_220826-300x152.png 300w\" sizes=\"(max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" width=\"683\" height=\"369\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/Snap87.jpg\" alt=\"\" class=\"wp-image-2260\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap87.jpg 683w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap87-300x162.jpg 300w\" sizes=\"(max-width: 683px) 100vw, 683px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"686\" height=\"409\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/Snap88.jpg\" alt=\"\" class=\"wp-image-2261\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap88.jpg 686w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap88-300x179.jpg 300w\" sizes=\"(max-width: 686px) 100vw, 686px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"692\" height=\"392\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/Snap89.jpg\" alt=\"\" class=\"wp-image-2262\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap89.jpg 692w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap89-300x170.jpg 300w\" sizes=\"(max-width: 692px) 100vw, 692px\" \/><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"682\" height=\"448\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/Snap91.jpg\" alt=\"\" class=\"wp-image-2263\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap91.jpg 682w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/Snap91-300x197.jpg 300w\" sizes=\"(max-width: 682px) 100vw, 682px\" \/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin m\u00e0 ch\u00fang t\u00f4i cung c\u1ea5p cho b\u1ea1n \u0111\u1ecdc v\u1ec1 \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng. \u0110\u00e2y \u0111\u1ec1u l\u00e0 nh\u1eefng t\u00ednh ch\u1ea5t th\u00fa v\u1ecb, c\u00f9ng nh\u1eefng b\u00e0i h\u1ecdc li\u00ean quan cho <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> tham kh\u1ea3o. \u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt qua g\u01b0\u01a1ng ph\u1eb3ng l\u00e0 ki\u1ebfn th\u1ee9c r\u1ea5t c\u01a1 b\u1ea3n. Th\u1ebf n\u00ean b\u1ea5t c\u1ee9 <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a> n\u00e0o c\u0169ng n\u00ean h\u1ecdc k\u1ef9 v\u00e0 ghi nh\u1edb \u0111\u1ec3 c\u00f3 th\u1ec3 l\u00e0m b\u00e0i tr\u00f4i ch\u1ea3y nh\u1ea5t nh\u00e9. \u0110\u1eebng qu\u00ean tham kh\u1ea3o th\u00eam nh\u1eefng b\u00e0i vi\u1ebft kh\u00e1c \u1edf tr\u00ean website c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec3 hi\u1ec3u th\u00eam nhi\u1ec1u ki\u1ebfn th\u1ee9c. V\u00ed d\u1ee5 ki\u1ebfn th\u1ee9c \u0111\u1ecbnh lu\u1eadt ph\u1ea3n x\u1ea1 \u00e1nh s\u00e1ng c\u0169ng r\u1ea5t b\u1ed5 \u00edch, h\u00e3y click v\u00e0o ngay!<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Xem th\u00eam<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-16-9 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng \u2013 V\u1eadt l\u00ed 7 \u2013 C\u00f4 Nguy\u1ec5n Th\u1ecb Loan\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/wch88c3OgHo?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe>\n<\/div><figcaption>\u1ea2nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng ph\u1eb3ng \u2013 V\u1eadt l\u00ed 7<\/figcaption><\/figure>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn \u0110\u1ed1i v\u1edbi v\u1eadt l\u00fd h\u1ecdc l\u1edbp 7, quang h\u1ecdc l\u00e0 m\u1ed9t trong nh\u1eefng ch\u01b0\u01a1ng v\u00f4 c\u00f9ng quan tr\u1ecdng. Hi\u1ec3u \u0111\u01b0\u1ee3c v\u1ec1 nh\u1eefng ki\u1ebfn th\u1ee9c n\u00e0y s\u1ebd gi\u00fap c\u00e1c em m\u1edf mang t\u1ea7m hi\u1ec3u bi\u1ebft h\u01a1n r\u1ea5t nhi\u1ec1u. Do \u0111\u00f3, h\u00e3y c\u00f9ng ch\u00fang t\u00f4i t\u00ecm hi\u1ec3u ngay v\u1ec1 \u1ea3nh c\u1ee7a [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2257,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[4,7],"tags":[],"class_list":["post-1019","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trung-hoc","category-vat-ly"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1019","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=1019"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1019\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media\/2257"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1019"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1019"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1019"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}