{"id":1023,"date":"2021-10-08T13:03:02","date_gmt":"2021-10-08T13:03:02","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=1023"},"modified":"2021-10-15T16:26:47","modified_gmt":"2021-10-15T09:26:47","slug":"guong-cau-lom-la-gi-ban-co-biet-kien-thuc-vat-ly-7","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/guong-cau-lom-la-gi-ban-co-biet-kien-thuc-vat-ly-7\/","title":{"rendered":"G\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u00e0 g\u00ec b\u1ea1n c\u00f3 bi\u1ebft? Ki\u1ebfn th\u1ee9c v\u1eadt 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=\"G\u01b0\u01a1ng c\u1ea7u l\u00f5m - B\u00e0i 8 - 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\/zQl9CaMwnKE?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 v\u1ec1 g\u01b0\u01a1ng c\u1ea7u l\u00f5m<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00ean c\u1ea1nh nh\u1eefng ki\u1ebfn th\u1ee9c quen thu\u1ed9c v\u1ec1 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i v\u00e0 g\u01b0\u01a1ng ph\u1eb3ng. G\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u00e0 m\u1ed9t trong nh\u1eefng kh\u00e1i ni\u1ec7m \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi quan t\u00e2m \u0111\u1ebfn. N\u1ebfu nh\u01b0 b\u1ea1n mu\u1ed1n bi\u1ebft v\u1ec1 t\u00ednh ch\u1ea5t g\u01b0\u01a1ng c\u1ea7u l\u00f5m, kh\u00e1i ni\u1ec7m v\u00e0 nh\u1eefng b\u00e0i t\u1eadp li\u00ean quan. H\u00e3y \u0111\u1ecdc ngay b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec3 c\u00f3 \u0111\u01b0\u1ee3c nh\u1eefng th\u00f4ng tin c\u1ea7n thi\u1ebft nh\u1ea5t nh\u00e9. Tin r\u1eb1ng nh\u1eefng chia s\u1ebb m\u00e0 ch\u00fang t\u00f4i mang \u0111\u1ebfn s\u1ebd kh\u00f4ng l\u00e0m cho b\u1ea1n th\u1ea5y th\u1ea5t v\u1ecdng. C\u00f9ng b\u1eaft \u0111\u1ea7u th\u00f4i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Minh h\u1ecda g\u01b0\u01a1ng c\u1ea7u l\u00f5m ra sao?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">G\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nhi\u1ec1u ng\u01b0\u1eddi ph\u00e2n v\u00e2n kh\u00f4ng bi\u1ebft g\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u00e0 g\u00ec. Th\u1ef1c t\u1ebf, chi\u1ebfc g\u01b0\u01a1ng n\u00e0y c\u00f2n c\u00f3 t\u00ean g\u1ecdi kh\u00e1c l\u00e0 g\u01b0\u01a1ng h\u1ed9i t\u1ee5. G\u01b0\u01a1ng h\u1ed9i t\u1ee5 l\u00e0 g\u01b0\u01a1ng c\u00f3 m\u1ed9t b\u1ec1 m\u1eb7t ph\u1ea3n x\u1ea1, ch\u00ednh l\u00e0 m\u1eb7t tr\u1ecdng c\u1ee7a m\u1ed9t ph\u1ea7n h\u00ecnh c\u1ea7u. Ch\u00fang \u0111\u01b0\u1ee3c h\u01b0\u1edbng v\u1ec1 ngu\u1ed3n s\u00e1ng, t\u1ea1o th\u00e0nh g\u01b0\u01a1ng h\u1ed9i t\u1ee5. \u1ea2nh c\u1ee7a v\u1eadt t\u1ea1o t\u1eeb chi\u1ebfc g\u01b0\u01a1ng n\u00e0y s\u1ebd l\u00e0 \u1ea3nh \u1ea3o, v\u00e0 c\u00f3 \u0111\u1ed9 l\u1edbn kh\u00f4ng b\u1eb1ng v\u1edbi v\u1eadt. \u1ea2nh thu \u0111\u01b0\u1ee3c s\u1ebd l\u1edbn h\u01a1n so v\u1edbi v\u1eadt.<\/p>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>T\u00ecm hi\u1ec3u th\u00eam v\u1ec1 G\u01b0\u01a1ng c\u1ea7u l\u1ed3i<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">G\u01b0\u01a1ng c\u1ea7u l\u00f5m c\u00f3 t\u00e1c d\u1ee5ng g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eafc \u0111\u1ebfn t\u00e1c d\u1ee5ng c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u00f5m, ta c\u00f3 th\u1ec3 th\u1ea5y r\u1eb1ng chi\u1ebfc g\u01b0\u01a1ng n\u00e0y c\u00f3 t\u00e1c d\u1ee5ng gi\u00fap bi\u1ebfn \u0111\u1ed5i c\u00e1c tia. Ch\u00fang c\u00f3 th\u1ec3 khi\u1ebfn m\u1ed9t ch\u00f9m tia s\u00e1ng t\u1edbi song song, \u0111\u1ed5i th\u00e0nh 1 ch\u00f9m tia ph\u1ea3n x\u1ea1 h\u1ed9i t\u1ee5 \u1edf 1 \u0111i\u1ec3m tr\u01b0\u1edbc g\u01b0\u01a1ng. Ngo\u00e0i ra trong tr\u01b0\u1eddng h\u1ee3p ng\u01b0\u1ee3c l\u1ea1i c\u0169ng t\u01b0\u01a1ng t\u1ef1. Bi\u1ebfn \u0111\u1ed5i t\u1eeb m\u1ed9t ch\u00f9m tia t\u1edbi ph\u00e2n k\u1ef3 tr\u1edf th\u00e0nh m\u1ed9t ch\u00f9m tia ph\u1ea3n x\u1ea1 song song.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1c bi\u1ec7t v\u1edbi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i, t\u00ednh ch\u1ea5t \u1ea3nh c\u1ee7a v\u1eadt c\u00f3 th\u1ec3 thay \u0111\u1ed5i. Ch\u00fang s\u1ebd kh\u00e1c nhau, ph\u1ee5 thu\u1ed9c v\u00e0o v\u1ecb tr\u00ed t\u01b0\u01a1ng \u0111\u1ed1i c\u1ee7a v\u1eadt \u0111\u1ed1i v\u1edbi t\u00e2m c\u1ee7a g\u01b0\u01a1ng v\u00e0 ti\u00eau \u0111i\u1ec3m. V\u1edbi g\u01b0\u01a1ng h\u1ed9i t\u1ee5, khi \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi chi\u1ebfu v\u00e0o, ch\u00fang s\u1ebd t\u1eeb t\u1eeb nung n\u00f3ng v\u00e0 c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1ed1t ch\u00e1y v\u1eadt.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.vietlearn.org\/post\/wp-content\/uploads\/2021\/10\/guong-cau-loi-va-guong-cau-lom.jpg\" alt=\"\" class=\"wp-image-2822\" width=\"729\" height=\"322\" srcset=\"https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/guong-cau-loi-va-guong-cau-lom.jpg 650w, https:\/\/www.vietlearn.org\/kien-thuc\/wp-content\/uploads\/2021\/10\/guong-cau-loi-va-guong-cau-lom-300x132.jpg 300w\" sizes=\"(max-width: 729px) 100vw, 729px\" \/><figcaption>G\u01b0\u01a1ng c\u1ea7u l\u1ed3i v\u00e0 g\u01b0\u01a1ng c\u1ea7u l\u00f5m<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00ednh ch\u1ea5t c\u1ee7a g\u01b0\u01a1ng h\u1ed9i t\u1ee5 l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eafc \u0111\u1ebfn t\u00ednh ch\u1ea5t c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u00f5m, ta c\u00f3 th\u1ec3 li\u1ec7t k\u00ea ra \u0111\u01b0\u1ee3c m\u1ed9t s\u1ed1 t\u00ednh ch\u1ea5t d\u1ec5 th\u1ea5y nh\u01b0 sau:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code>  G\u01b0\u01a1ng h\u1ed9i t\u1ee5 cho \u1ea3nh l\u00e0 \u1ea3nh \u1ea3o. Ch\u00fang c\u00f3 c\u00f9ng chi\u1ec1u, l\u1edbn h\u01a1n so v\u1edbi v\u1eadt. Kho\u1ea3ng c\u00e1ch t\u1eeb v\u1eadt \u0111\u1ebfn g\u01b0\u01a1ng s\u1ebd nh\u1ecf h\u01a1n so v\u1edbi kho\u1ea3ng c\u00e1ch t\u1eeb ti\u00eau \u0111i\u1ec3m \u0111i \u0111\u1ebfn g\u01b0\u01a1ng. L\u00fac n\u00e0y c\u00f4ng th\u1ee9c l\u00e0 d&lt;f\n\n  G\u01b0\u01a1ng h\u1ed9i t\u1ee5 s\u1ebd cho \u1ea3nh th\u1eadt, ng\u01b0\u1ee3c chi\u1ec1u v\u1edbi v\u1eadt \u1edf tr\u00ean m\u00e0n ch\u1eafn tr\u01b0\u1edbc g\u01b0\u01a1ng. \u1ea2nh s\u1ebd l\u1edbn h\u01a1n v\u1eadt n\u1ebfu nh\u01b0 v\u1eadt n\u1eb1m trong kho\u1ea3ng gi\u1eefa t\u00e2m c\u1ee7a g\u01b0\u01a1ng t\u1edbi ti\u00eau \u0111i\u1ec3m. L\u00fac n\u00e0y c\u00f4ng th\u1ee9c l\u00e0 f&lt;d&lt;2f\n\n  N\u1ebfu g\u01b0\u01a1ng h\u1ed9i t\u1ee5 cho \u1ea3nh th\u1eadt kh\u00f4ng c\u00f9ng chi\u1ec1u v\u1edbi v\u1eadt. \u1ea2nh n\u00e0y ng\u01b0\u1ee3c chi\u1ec1u m\u00e0n ch\u1eafn tr\u01b0\u1edbc g\u01b0\u01a1ng v\u00e0 nh\u1ecf h\u01a1n so v\u1edbi v\u1eadt. L\u00fac n\u00e0y kho\u1ea3ng c\u00e1ch t\u1eeb v\u1eadt \u0111\u1ebfn g\u01b0\u01a1ng s\u1ebd l\u1edbn h\u01a1n so v\u1edbi kho\u1ea3ng c\u00e1ch t\u1eeb t\u00e2m \u0111\u1ebfn g\u01b0\u01a1ng. C\u00f4ng th\u1ee9c l\u00e0 d &gt;2f\n\n  G\u01b0\u01a1ng h\u1ed9i t\u1ee5 c\u00f3 kh\u1ea3 n\u0103ng bi\u1ebfn \u0111\u1ed5i m\u1ed9t ch\u00f9m tia s\u00e1ng n\u00e0y th\u00e0nh tia s\u00e1ng kia. C\u1ee5 th\u1ec3, bi\u1ebfn \u0111\u1ed5i m\u1ed9t ch\u00f9m tia s\u00e1ng t\u1edbi song song tr\u1edf th\u00e0nh ch\u00f9m tia ph\u1ea3n x\u1ea1 h\u1ed9i t\u1ee5. Bi\u1ebfn \u0111\u1ed5i ch\u00f9m tia s\u00e1ng ph\u00e2n k\u1ef3 ho\u1eb7c h\u1ed9i t\u1ee5 tr\u1edf th\u00e0nh ch\u00f9m tia ph\u1ea3n x\u1ea1 song song. Bi\u1ebfn \u0111\u1ed5i ch\u00f9m tia s\u00e1ng ph\u00e2n k\u00ec th\u00e0nh m\u1ed9t ch\u00f9m tia h\u1ed9i t\u1ee5. Ngo\u00e0i ra c\u00f2n c\u00f3 th\u1ec3 bi\u1ebfn \u0111\u1ed5i ch\u00f9m tia s\u00e1ng h\u1ed9i t\u1ee5 tr\u1edf th\u00e0nh ch\u00f9m tia ph\u1ea3n x\u1ea1 ph\u00e2n k\u1ef3.<\/code><\/pre>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\"><p>T\u00ecm hi\u1ec3u th\u00eam \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<\/p><\/blockquote>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ee8ng d\u1ee5ng c\u1ee7a g\u01b0\u01a1ng h\u1ed9i t\u1ee5 l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Nh\u1eafc \u0111\u1ebfn \u1ee9ng d\u1ee5ng c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u00f5m, nhi\u1ec1u ng\u01b0\u1eddi ngh\u0129 ngay \u0111\u1ebfn c\u00e2u chuy\u1ec7n t\u1eeb x\u01b0a. Acsimet l\u00e0 nh\u00e0 v\u1eadt l\u00fd h\u1ecdc n\u1ed5i ti\u1ebfng. \u00d4ng \u0111\u00e3 t\u1ea1o ra g\u01b0\u01a1ng h\u1ed9i t\u1ee5 b\u1eb1ng nhi\u1ec1u lo\u1ea1i g\u01b0\u01a1ng ph\u1eb3ng, x\u1ebfp l\u1ea1i theo h\u00ecnh v\u00f2ng cung. Nh\u1edd c\u00e1ch \u0111\u00f3, l\u1ee3i d\u1ee5ng s\u1ef1 soi s\u00e1ng c\u1ee7a m\u1eb7t tr\u1eddi, \u00f4ng \u0111\u00e3 \u0111\u1ed1t ch\u00e1y \u0111\u01b0\u1ee3c thuy\u1ec1n c\u1ee7a \u0111\u1ecbch.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u1ee8ng d\u1ee5ng c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u00f5m<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\nhttps:\/\/www.youtube.com\/watch?v=BM5J2m7GWMk\n<\/div><figcaption>Th\u00ed nghi\u1ec7m g\u01b0\u01a1ng c\u1ea7u l\u00f5m<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3 nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u1ee7a chi\u1ebfc g\u01b0\u01a1ng n\u00e0y trong cu\u1ed9c s\u1ed1ng h\u00e0ng ng\u00e0y. G\u01b0\u01a1ng h\u1ed9i t\u1ee5 ph\u00f9 h\u1ee3p \u0111\u1ec3 ch\u1ebf t\u1ea1o nh\u1eefng lo\u1ea1i chao \u0111\u00e8n, k\u00ednh thi\u00ean v\u0103n\u2026 Ngo\u00e0i ra c\u00f2n c\u00f3 th\u1ec3 l\u00e0m d\u1ee5ng c\u1ee5 cho c\u00e1c b\u00e1c s\u0129 nha khoa.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Chi ti\u1ebft h\u01a1n, ch\u00fang \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 l\u00e0m c\u00e1c pha \u0111\u00e8n c\u1ee7a \u0111\u00e8n pin, \u0111\u00e8n \u00f4 t\u00f4. Ngo\u00e0i ra ch\u1ebf t\u1ea1o c\u00e1c thi\u1ebft b\u1ecb k\u00ednh thi\u00ean v\u0103n c\u1ee1 l\u1edbn. R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e3 s\u1eed d\u1ee5ng ch\u00fang \u0111\u1ec3 t\u1eadp trung \u0111\u01b0\u1ee3c n\u0103ng l\u01b0\u1ee3ng \u00e1nh s\u00e1ng M\u1eb7t tr\u1eddi v\u00e0o trong m\u1ed9t \u0111i\u1ec3m. Nh\u1edd \u0111\u00f3, h\u1ecd c\u00f3 th\u1ec3 \u0111un n\u01b0\u1edbc, \u0111un ch\u1ea3y kim lo\u1ea1i\u2026 nhanh v\u00e0 ti\u1ec7n h\u01a1n. N\u0103ng l\u01b0\u1ee3ng n\u00e0y c\u0169ng \u0111\u01b0\u1ee3c d\u00f9ng cho vi\u1ec7c \u0111un b\u1ebfp, l\u00e0m pin c\u0169ng c\u1ef1c k\u1ef3 nhanh ch\u00f3ng v\u00e0 ti\u1ec7n l\u1ee3i.<\/p>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"G\u01b0\u01a1ng c\u1ea7u l\u00f5m \u0111\u1ed1t ch\u00e1y g\u1ed7\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/ripniyi71EI?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>G\u01b0\u01a1ng c\u1ea7u l\u00f5m \u0111\u1ed1t ch\u00e1y g\u1ed7<\/figcaption><\/figure>\n\n\n\n<figure class=\"wp-block-embed is-type-video is-provider-youtube wp-block-embed-youtube wp-embed-aspect-4-3 wp-has-aspect-ratio\"><div class=\"wp-block-embed__wrapper\">\n<iframe title=\"\u1ee8ng d\u1ee5ng c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u00f5m\" width=\"500\" height=\"375\" src=\"https:\/\/www.youtube.com\/embed\/tQdAbdzzcB0?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>\u1ee8ng d\u1ee5ng c\u1ee7a g\u01b0\u01a1ng c\u1ea7u l\u00f5m<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m cho g\u01b0\u01a1ng h\u1ed9i t\u1ee5 b\u1ea1n n\u00ean bi\u1ebft<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e2u h\u1ecfi tr\u1eafc nghi\u1ec7m th\u01b0\u1eddng g\u1eb7p cho ph\u1ea7n b\u00e0i t\u1eadp g\u01b0\u01a1ng c\u1ea7u l\u00f5m. C\u00e1c em n\u00ean \u0111\u1ecdc k\u1ef9 l\u00fd thuy\u1ebft \u0111\u1ec3 tr\u00e1nh b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i. Ph\u1ea7n l\u00fd thuy\u1ebft c\u1ee7a lo\u1ea1i g\u01b0\u01a1ng n\u00e0y \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 kh\u00f3 h\u01a1n h\u1eb3n v\u00e0 r\u1eafc r\u1ed1i h\u01a1n. Th\u1ebf n\u00ean h\u00e3y ch\u1eafc ch\u1eafn r\u1eb1ng m\u00ecnh n\u1eafm v\u1eefng \u0111\u01b0\u1ee3c c\u01a1 b\u1ea3n tr\u01b0\u1edbc khi b\u1eaft tay v\u00e0o l\u00e0m b\u00e0i t\u1eadp b\u1ea1n nh\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ngo\u00e0i ra, c\u00e1ch l\u00e0m b\u00e0i t\u1eadp c\u0169ng s\u1ebd gi\u00fap c\u1ee7ng c\u1ed1 th\u00eam ki\u1ebfn th\u1ee9c cho c\u00e1c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc sinh<\/a>. \u0110\u00e2y gi\u1ed1ng nh\u01b0 m\u1ed9t l\u1ea7n h\u1ecdc l\u1ea1i \u0111\u1ec3 c\u00e1c b\u1ea1n nh\u1edb \u0111\u01b0\u1ee3c ki\u1ebfn th\u1ee9c h\u01a1n. Th\u1ebf n\u00ean \u0111\u1eebng \u0111\u00e1nh gi\u00e1 th\u1ea5p s\u1ef1 quan tr\u1ecdng c\u1ee7a vi\u1ec7c l\u00e0m b\u00e0i t\u1eadp nh\u00e9. Sau khi h\u1ecdc xong l\u00fd thuy\u1ebft, c\u00e1c em b\u1eaft tay v\u00e0o l\u00e0m b\u00e0i t\u1eadp. Nh\u1eefng b\u00e0i t\u1eadp n\u00e0y tuy ng\u1eafn nh\u01b0ng c\u00f3 th\u1ec3 \u0111\u00e1nh gi\u00e1 \u0111\u01b0\u1ee3c c\u00e1c em \u0111ang b\u1ecb h\u1ed5ng \u1edf ch\u1ed7 n\u00e0o. L\u00e0m b\u00e0i sau v\u00e0 ki\u1ec3m tra k\u1ebft qu\u1ea3, n\u1ebfu nh\u01b0 th\u1ea5y m\u00ecnh b\u1ecb sai \u1edf c\u00e2u n\u00e0o, h\u00e3y \u0111\u00e1nh d\u1ea5u l\u1ea1i. Sau \u0111\u00f3 c\u00e1c em h\u00e3y h\u1ecdc k\u1ef9 ki\u1ebfn th\u1ee9c \u0111\u00f3 \u0111\u1ec3 ch\u1eafc ch\u1eafn r\u1eb1ng m\u00ecnh kh\u00f4ng b\u1ecb sai \u1edf b\u00e0i thi n\u1eefa nh\u00e9.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Chi\u1ebfc g\u01b0\u01a1ng gi\u00fap ph\u00f3ng to v\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i t\u1eadp g\u01b0\u01a1ng h\u1ed9i t\u1ee5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 1: \u1ea2nh \u1ea3o c\u1ee7a v\u1eadt t\u1ea1o b\u1edfi g\u01b0\u01a1ng h\u1ed9i t\u1ee5 s\u1ebd c\u00f3 t\u00ednh ch\u1ea5t n\u00e0o d\u01b0\u1edbi \u0111\u00e2y b\u1ea1n c\u00f3 bi\u1ebft?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A Nh\u1ecf h\u01a1n so v\u1edbi \u1ea3nh t\u1ea1o b\u1edfi g\u01b0\u01a1ng c\u1ea7u l\u1ed3i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B \u1ea2nh t\u1ea1o \u0111\u01b0\u1ee3c s\u1ebd nh\u1ecf h\u01a1n so v\u1edbi v\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C \u1ea2nh t\u1ea1o \u0111\u01b0\u1ee3c s\u1ebd l\u1edbn h\u01a1n so v\u1edbi v\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D \u1ea2nh t\u1ea1o \u0111\u01b0\u1ee3c s\u1ebd l\u1edbn b\u1eb1ng v\u1eadt<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 2: Chi\u1ebfu m\u1ed9t ch\u00f9m tia t\u1edbi song song l\u00ean g\u01b0\u01a1ng c\u1ea7u l\u00f5m, khi \u0111\u00f3 ta thu \u0111\u01b0\u1ee3c ch\u00f9m tia ph\u1ea3n x\u1ea1 v\u1edbi t\u00ednh ch\u1ea5t nh\u01b0 th\u1ebf n\u00e0o?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A ch\u00f9m tia kh\u00f4ng truy\u1ec1n theo \u0111\u01b0\u1eddng th\u1eb3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B Ch\u00f9m tia ph\u00e2n k\u1ef3<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C Ch\u00f9m tia h\u1ed9i t\u1ee5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D Ch\u00f9m tia song song<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 3: V\u00ec sao khi c\u00f3 pha \u0111\u00e8n m\u00e0 \u0111\u00e8n pin c\u00f3 th\u1ec3 chi\u1ebfu s\u00e1ng xa h\u01a1n so v\u1edbi khi ta kh\u00f4ng c\u00f3 pha \u0111\u00e8n?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A V\u00ec nh\u1edd c\u00f3 pha \u0111\u00e8n, ta c\u00f3 th\u1ec3 t\u1ea1o th\u00e0nh m\u1ed9t ch\u00f9m tia ph\u1ea3n x\u1ea1 song song<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B V\u00ec nh\u1edd c\u00f3 pha \u0111\u00e8n, ta c\u00f3 th\u1ec3 l\u00e0m cho \u00e1nh s\u00e1ng tr\u1edf n\u00ean m\u1ea1nh th\u00eam<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C V\u00ec nh\u1edd c\u00f3 pha \u0111\u00e8n, \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c h\u1ed9i t\u1ee5 \u1edf m\u1ed9t \u0111i\u1ec3m xa h\u01a1n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D V\u00ec nh\u1edd c\u00f3 pha \u0111\u00e8n, m\u00e0 \u00e1nh s\u00e1ng c\u00f3 kh\u1ea3 n\u0103ng \u0111\u01b0\u1ee3c ph\u1ea3n x\u1ea1<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 4: V\u00ec sao g\u01b0\u01a1ng h\u1ed9i t\u1ee5 kh\u00f4ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 quan s\u00e1t c\u00e1c \u1ea3nh \u1ea3o c\u1ee7a c\u00e1c v\u1eadt \u1edf \u0111\u1eb1ng sau xe?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A B\u1edfi v\u00ec \u1ea3nh \u1ea3o n\u1eb1m \u1edf xa so v\u1edbi g\u01b0\u01a1ng, ph\u00eda \u0111\u1eb1ng sau m\u1eaft<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B B\u1edfi v\u00ec \u1ea3nh \u1ea3o c\u00f3 \u0111\u1ed9 l\u1edbn nh\u1ecf h\u01a1n g\u01b0\u01a1ng nhi\u1ec1u l\u1ea7n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C B\u1edfi v\u00ec v\u1eadt ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf r\u1ea5t g\u1ea7n g\u01b0\u01a1ng m\u1edbi cho ra \u1ea3nh \u1ea3o<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D B\u1edfi v\u00ec \u1ea3nh kh\u00f4ng \u0111\u01b0\u1ee3c r\u00f5 n\u00e9t n\u1ebfu s\u1eed d\u1ee5ng lo\u1ea1i g\u01b0\u01a1ng n\u00e0y<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 5: Trong c\u00e1c lo\u1ea1i g\u01b0\u01a1ng th\u01b0\u1eddng g\u1eb7p, g\u01b0\u01a1ng n\u00e0o s\u1ebd cho \u1ea3nh \u1ea3o c\u1ee7a c\u00f9ng m\u1ed9t v\u1eadt c\u00f3 k\u00edch th\u01b0\u1edbc l\u1edbn h\u01a1n? S\u1eafp x\u1ebfp k\u00edch th\u01b0\u1edbc theo t\u1ee9 t\u1ef1 t\u0103ng d\u1ea7n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A G\u01b0\u01a1ng c\u1ea7u l\u1ed3i, g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng h\u1ed9i t\u1ee5<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B G\u01b0\u01a1ng h\u1ed9i t\u1ee5, g\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng c\u1ea7u l\u1ed3i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C G\u01b0\u01a1ng h\u1ed9i t\u1ee5, g\u01b0\u01a1ng ph\u00e2n k\u1ef3, ph\u01b0\u01a1ng ph\u1eb3ng<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D G\u01b0\u01a1ng ph\u1eb3ng, g\u01b0\u01a1ng h\u1ed9i t\u1ee5, g\u01b0\u01a1ng c\u1ea7u l\u1ed3i<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u0110\u00e1p \u00e1n cho b\u00e0i t\u1eadp g\u01b0\u01a1ng c\u1ea7u l\u00f5m<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 1: \u0110\u00e1p \u00e1n C<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 2: \u0110\u00e1p \u00e1n C<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 3: \u0110\u00e1p \u00e1n A<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 4: \u0110\u00e1p \u00e1n C<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">B\u00e0i 5: \u0110\u00e1p \u00e1n C<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1ch v\u1ebd g\u01b0\u01a1ng c\u1ea7u l\u00f5m trong v\u1eadt l\u00fd<\/p>\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 mang \u0111\u1ebfn cho b\u1ea1n \u0111\u1ecdc v\u1ec1 g\u01b0\u01a1ng c\u1ea7u l\u00f5m. Tin r\u1eb1ng nh\u1eefng chia s\u1ebb c\u1ea3 v\u1ec1 ki\u1ebfn th\u1ee9c v\u00e0 b\u00e0i t\u1eadp n\u00e0y s\u1ebd khi\u1ebfn b\u1ea1n hi\u1ec3u ra nhi\u1ec1u \u0111i\u1ec1u. \u0110\u00e2y l\u00e0 m\u1ed9t ki\u1ebfn th\u1ee9c kh\u00f3 v\u00e0 c\u00f3 r\u1ea5t nhi\u1ec1u b\u00e0i t\u1eadp v\u1eadt l\u00fd hay. Th\u1ebf n\u00ean h\u00e3y c\u1ed1 g\u1eafng h\u1ecdc hi\u1ec3u v\u00e0 \u0111\u00e0o s\u00e2u th\u00eam \u0111\u1ec3 lu\u00f4n \u0111\u1ea1t \u0111i\u1ec3m cao b\u1ea1n nh\u00e9. \u0110\u1eebng qu\u00ean tham kh\u1ea3o th\u00eam nh\u1eefng b\u00e0i vi\u1ebft kh\u00e1c \u1edf website c\u1ee7a ch\u00fang t\u00f4i \u0111\u1ec3 bi\u1ebft th\u00eam chi ti\u1ebft. Chia s\u1ebb v\u1ec1 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i s\u1ebd kh\u00f4ng l\u00e0m b\u1ea1n th\u1ea5t v\u1ecdng \u0111\u00e2u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/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=\"Concave Mirror Images - Characteristics | Reflection and Refraction | Don&#039;t Memorise\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/Hp0PsU6mUGs?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>Concave Mirror Images &#8211; Characteristics<\/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 B\u00ean c\u1ea1nh nh\u1eefng ki\u1ebfn th\u1ee9c quen thu\u1ed9c v\u1ec1 g\u01b0\u01a1ng c\u1ea7u l\u1ed3i v\u00e0 g\u01b0\u01a1ng ph\u1eb3ng. G\u01b0\u01a1ng c\u1ea7u l\u00f5m l\u00e0 m\u1ed9t trong nh\u1eefng kh\u00e1i ni\u1ec7m \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi quan t\u00e2m \u0111\u1ebfn. N\u1ebfu nh\u01b0 b\u1ea1n mu\u1ed1n bi\u1ebft v\u1ec1 t\u00ednh ch\u1ea5t g\u01b0\u01a1ng c\u1ea7u l\u00f5m, kh\u00e1i ni\u1ec7m v\u00e0 nh\u1eefng b\u00e0i t\u1eadp li\u00ean quan. H\u00e3y [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":2821,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[4],"tags":[],"class_list":["post-1023","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-trung-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1023","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=1023"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/1023\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media\/2821"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=1023"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=1023"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=1023"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}