T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 4 – Arkady Leokum<\/p>\n\n\n\n
Kh\u00f4ng gian ba chi\u1ec1u l\u00e0 kh\u00f4ng gian l\u1ea5y th\u00e2n x\u00e1c ta l\u00e0m chu\u1ea9n. Chi\u1ec1u th\u1ee9 nh\u1ea5t l\u00e0 chi\u1ec1u ngang (tr\u00e1i – ph\u1ea3i). Chi\u1ec1u th\u1ee9 hai l\u00e0 chi\u1ec1u d\u1ecdc (ch\u00e2n – \u0111\u1ea7u). Chi\u1ec1u th\u1ee9 ba l\u00e0 chi\u1ec1u xuy\u00ean (tr\u01b0\u1edbc m\u1eb7t – sau l\u01b0ng). Khi nh\u00ecn tr\u00ean c\u00e1nh \u0111\u1ed3ng r\u1ed9ng v\u00e0 b\u1eb1ng ph\u1eb3ng, b\u1eb1ng c\u00e1ch n\u00e0o ta nh\u00ecn m\u1ed9t \u0111\u1ed1i v\u1eadt n\u00e0y l\u1edbn h\u01a1n ho\u1eb7c \u1edf ph\u00eda tr\u01b0\u1edbc, ph\u00eda sau \u0111\u1ed1i v\u1eadt kia? T\u1ea1i sao ta kh\u00f4ng nh\u00ecn m\u1ecdi s\u1ef1 d\u1eb9p l\u00e9p, b\u1eb1ng ph\u1eb3ng m\u00e0 l\u1ea1i nh\u00ecn th\u1ea5y s\u1ef1 v\u1eadt theo ba chi\u1ec1u v\u00e0 trong m\u1ed1i t\u01b0\u01a1ng quan v\u1edbi b\u1ed1i c\u1ea3nh? L\u00fd do v\u1eabn l\u00e0: ta kh\u00f4ng ch\u1ec9 nh\u00ecn \u0111\u1ed1i v\u1eadt b\u1eb1ng m\u1eaft m\u00e0 c\u00f2n b\u1eb1ng tr\u00ed n\u00e3o, nh\u00ecn \u0111\u1ed1i v\u1eadt trong \u201c\u00e1nh s\u00e1ng c\u1ee7a kinh nghi\u1ec7m\u201d. N\u1ebfu tr\u00ed n\u00e3o c\u1ee7a ta kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c nh\u1eefng \u201c\u00e1m hi\u1ec7u\u201d m\u00e0 n\u00f3 \u0111\u00e3 \u201ch\u1ecdc\u201d \u0111\u01b0\u1ee3c – t\u1ee9c l\u00e0 kinh nghi\u1ec7m – \u0111\u1ec3 th\u00f4ng d\u1ecbch h\u00ecnh \u1ea3nh \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o cho n\u00f3 nh\u1eadn di\u1ec7n th\u00ec c\u00e1i nh\u00ecn c\u1ee7a ta r\u1ea5t l\u00e0 r\u1ed1i r\u1eafm, l\u1ed9n x\u1ed9n. Ch\u1eb3ng h\u1ea1n, kinh nghi\u1ec7m cho ta bi\u1ebft k\u00edch c\u1ee1 c\u1ee7a c\u00e1c s\u1ef1 v\u1eadt. M\u1ed9t ng\u01b0\u1eddi \u0111\u1ee9ng trong chi\u1ebfc thuy\u1ec1n ngo\u00e0i kh\u01a1i xa b\u1edd th\u00ec nom nh\u1ecf h\u01a1n c\u0169ng ch\u00ednh ng\u01b0\u1eddi \u0111\u00f3 khi v\u00e0o \u0111\u1ebfn g\u1ea7n b\u1edd. Nh\u01b0ng ta kh\u00f4ng th\u1ec3 n\u00f3i h\u00ecnh \u1ea3nh cao l\u1edbn v\u00e0 h\u00ecnh \u1ea3nh nh\u1ecf b\u00e9 c\u1ee7a ng\u01b0\u1eddi \u0111\u00f3 l\u00e0 do hai ng\u01b0\u1eddi kh\u00e1c nhau. Nh\u1eefng \u201c\u00e1m hi\u1ec7u\u201d m\u00e0 tr\u00ed n\u00e3o ta d\u00f9ng l\u00e0 nh\u01b0 th\u1ebf n\u00e0o? M\u1ed9t trong c\u00e1c \u00e1m hi\u1ec7u \u0111\u00f3 l\u00e0 vi\u1ec5n c\u1ea3nh, chi\u1ec1u s\u00e2u. Nh\u00ecn hai \u0111\u01b0\u1eddng xe l\u1eeda ch\u1ea1y song song, ta th\u1ea5y ch\u00fang d\u01b0\u1eddng nh\u01b0 ch\u1eadp l\u1ea1i l\u00e0m m\u1ed9t \u1edf ph\u00eda \u0111\u1eb1ng xa. C\u0103n c\u1ee9 v\u00e0o kho\u1ea3ng c\u00e1ch gi\u1eefa hai \u0111\u01b0\u1eddng n\u00e0y ta bi\u1ebft \u0111\u01b0\u1ee3c \u0111\u1ed9 xa (c\u00e0ng \u1edf xa kho\u1ea3ng c\u00e1ch \u0111\u00f3 c\u00e0ng nh\u1ecf). \u0111\u1ed3ng th\u1eddi, kinh nghi\u1ec7m c\u0169ng cho th\u1ea5y v\u1eadt \u1edf g\u1ea7n th\u00ec r\u00f5 n\u00e9t h\u01a1n v\u1eadt \u1edf xa. C\u0169ng b\u1eb1ng kinh nghi\u1ec7m ta h\u1ecdc \u0111\u01b0\u1ee3c c\u00e1ch \u201c\u0111\u1ecdc\u201d \u0111\u01b0\u1ee3c b\u00f3ng (shadow) c\u1ee7a \u0111\u1ed1i v\u1eadt. Nh\u1eefng c\u00e1i b\u00f3ng \u0111\u00f3 l\u00e0 nh\u1eefng \u201c\u00e1m hi\u1ec7u\u201d v\u1ec1 h\u00ecnh d\u1ea1ng v\u00e0 m\u1ed1i t\u01b0\u01a1ng quan c\u1ee7a c\u00e1c \u0111\u1ed1i v\u1eadt. Nh\u1eefng \u0111\u1ed1i v\u1eadt \u1edf g\u1ea7n th\u00ec chi\u1ebfm ph\u1ea7n kh\u00f4ng gian b\u1ed1i c\u1ea3nh l\u1edbn h\u01a1n, do \u0111\u00f3 che l\u1ea5p nhi\u1ec1u \u0111\u1ed1i v\u1eadt \u1edf xa. S\u1ef1 nh\u00fac nh\u00edch c\u00e1i \u0111\u1ea7u c\u0169ng khi\u1ebfn ta c\u1ea3m th\u1ea5y c\u00e1i c\u00e2y hay c\u00e1i s\u00e0o \u201cl\u00f9i l\u1ea1i\u201d xa h\u01a1n. Ta nh\u1eafm m\u1ed9t m\u1eaft v\u00e0 nghi\u00eang \u0111\u1ea7u, ta th\u1ea5y d\u01b0\u1eddng nh\u01b0 \u0111\u1ed1i v\u1eadt \u1edf xa c\u0169ng chuy\u1ec3n \u0111\u1ed9ng theo trong khi \u0111\u00f3 \u0111\u1ed1i v\u1eadt \u1edf g\u1ea7n th\u00ec chuy\u1ec3n \u0111\u1ed9ng theo chi\u1ec1u ng\u01b0\u1ee3c l\u1ea1i. S\u1ef1 ph\u1ed1i h\u1ee3p ho\u1ea1t \u0111\u1ed9ng c\u1ee7a hai con m\u1eaft c\u0169ng cho ta nhi\u1ec1u \u201c\u00e1m hi\u1ec7u\u201d quan tr\u1ecdng. Khi \u0111\u1ed1i v\u1eadt di chuy\u1ec3n l\u1ea1i g\u1ea7n ph\u00eda ta v\u00e0 ta c\u1ed1 \u0111\u1ec3 gi\u1eef h\u00ecnh \u1ea3nh c\u1ee7a \u0111\u1ed1i v\u1eadt \u1ea5y trong ti\u00eau c\u1ef1 th\u00ec con m\u1eaft ta ph\u1ea3i ph\u1ed3ng ra (nh\u1ee1n c\u1ea7u cong l\u1ea1i h\u01a1n) v\u00e0 b\u1eafp c\u01a1 m\u1eaft b\u1ecb c\u0103ng h\u01a1n. Ch\u00ednh s\u1ef1 c\u0103ng b\u1eafp c\u01a1 n\u00e0y c\u0169ng l\u00e0 \u201c\u00e1m hi\u1ec7u\u201d cho bi\u1ebft v\u1eadt \u1edf g\u1ea7n.<\/p>\n","protected":false},"excerpt":{"rendered":"
T\u1eeb kh\u00f3a t\u00ecm ki\u1ebfm: H\u00e3y Tr\u1ea3 L\u1eddi Em T\u1ea1i Sao? \u2013 T\u1eadp 4 – Arkady Leokum Kh\u00f4ng gian ba chi\u1ec1u l\u00e0 kh\u00f4ng gian l\u1ea5y th\u00e2n x\u00e1c ta l\u00e0m chu\u1ea9n. Chi\u1ec1u th\u1ee9 nh\u1ea5t l\u00e0 chi\u1ec1u ngang (tr\u00e1i – ph\u1ea3i). Chi\u1ec1u th\u1ee9 hai l\u00e0 chi\u1ec1u d\u1ecdc (ch\u00e2n – \u0111\u1ea7u). Chi\u1ec1u th\u1ee9 ba l\u00e0 chi\u1ec1u xuy\u00ean (tr\u01b0\u1edbc m\u1eb7t […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[15],"tags":[],"class_list":["post-14315","post","type-post","status-publish","format-standard","hentry","category-hoi-dap-khoa-hoc"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14315","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=14315"}],"version-history":[{"count":1,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14315\/revisions"}],"predecessor-version":[{"id":14316,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/14315\/revisions\/14316"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=14315"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=14315"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=14315"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}