{"id":57714,"date":"2024-07-30T15:07:08","date_gmt":"2024-07-30T12:07:08","guid":{"rendered":"https:\/\/www.englishcentral.com\/blog\/?p=57714"},"modified":"2024-08-04T05:40:22","modified_gmt":"2024-08-04T02:40:22","slug":"cau-vong-hinh-thanh-nhu-the-nao","status":"publish","type":"post","link":"https:\/\/www.englishcentral.com\/blog\/vi\/cau-vong-hinh-thanh-nhu-the-nao\/","title":{"rendered":"C\u1ea7u V\u1ed3ng H\u00ecnh Th\u00e0nh Nh\u01b0 Th\u1ebf N\u00e0o?"},"content":{"rendered":"
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C\u1ea7u v\u1ed3ng (Rainbows), m\u1ed9t trong nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng thi\u00ean nhi\u00ean tuy\u1ec7t \u0111\u1eb9p v\u00e0 b\u00ed \u1ea9n, \u0111\u00e3 t\u1eeb l\u00e2u tr\u1edf th\u00e0nh ngu\u1ed3n c\u1ea3m h\u1ee9ng v\u00f4 t\u1eadn cho ngh\u1ec7 thu\u1eadt, v\u0103n h\u1ecdc v\u00e0 v\u0103n h\u00f3a d\u00e2n gian. Khi nh\u1eefng c\u01a1n m\u01b0a ng\u1eebng r\u01a1i v\u00e0 m\u1eb7t tr\u1eddi b\u1eaft \u0111\u1ea7u chi\u1ebfu s\u00e1ng tr\u1edf l\u1ea1i, ch\u00fang ta th\u01b0\u1eddng th\u1ea5y nh\u1eefng d\u1ea3i m\u00e0u r\u1ef1c r\u1ee1 xu\u1ea5t hi\u1ec7n tr\u00ean b\u1ea7u tr\u1eddi, t\u1ea1o n\u00ean m\u1ed9t c\u1ea3nh t\u01b0\u1ee3ng huy\u1ec1n \u1ea3o v\u00e0 m\u00ea ho\u1eb7c. Nh\u01b0ng b\u1ea1n \u0111\u00e3 bao gi\u1edd t\u1ef1 h\u1ecfi c\u1ea7u v\u1ed3ng th\u1ef1c s\u1ef1 l\u00e0 g\u00ec v\u00e0 n\u00f3 h\u00ecnh th\u00e0nh nh\u01b0 th\u1ebf n\u00e0o ch\u01b0a? Trong b\u00e0i vi\u1ebft n\u00e0y, ch\u00fang ta s\u1ebd c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 s\u1ef1 h\u00ecnh th\u00e0nh c\u1ee7a c\u1ea7u v\u1ed3ng, t\u1eeb th\u1ee9 t\u1ef1 c\u00e1c m\u00e0u s\u1eafc cho \u0111\u1ebfn c\u00e1c hi\u1ec7n t\u01b0\u1ee3ng c\u1ea7u v\u1ed3ng \u0111\u00f4i v\u00e0 c\u00e1ch t\u1ef1 t\u1ea1o ra m\u1ed9t c\u1ea7u v\u1ed3ng nh\u00e2n t\u1ea1o t\u1ea1i nh\u00e0. H\u00e3y c\u00f9ng b\u01b0\u1edbc v\u00e0o th\u1ebf gi\u1edbi k\u1ef3 di\u1ec7u c\u1ee7a c\u1ea7u v\u1ed3ng v\u00e0 kh\u00e1m ph\u00e1 nh\u1eefng b\u00ed m\u1eadt \u0111\u1eb1ng sau v\u1ebb \u0111\u1eb9p m\u00ea ho\u1eb7c c\u00f9ng EnglishCentral nh\u00e9!<\/p>\n\n\t\t<\/div>\n\t<\/div>\n

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C\u1ea7u v\u1ed3ng c\u00f3 m\u1ea5y m\u00e0u?<\/strong><\/h2>\n

C\u1ea7u v\u1ed3ng \u0111\u01b0\u1ee3c t\u1ea1o ra t\u1eeb ph\u1ea3n x\u1ea1 v\u00e0 kh\u00fac x\u1ea1 c\u1ee7a \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi qua gi\u1ecdt n\u01b0\u1edbc trong kh\u00f4ng kh\u00ed. C\u1ea7u v\u1ed3ng th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n v\u1edbi 7 m\u00e0u s\u1eafc c\u01a1 b\u1ea3n, \u0111\u00f3 l\u00e0: \u0111\u1ecf, cam, v\u00e0ng, l\u1ee5c, lam, ch\u00e0m v\u00e0 t\u00edm.
\nQu\u00e1 tr\u00ecnh t\u1ea1o ra m\u00e0u s\u1eafc trong c\u1ea7u v\u1ed3ng li\u00ean quan \u0111\u1ebfn s\u1ef1 kh\u00fac x\u1ea1 \u00e1nh s\u00e1ng theo g\u00f3c \u0111\u1ed9 kh\u00e1c nhau khi \u0111i qua gi\u1ecdt n\u01b0\u1edbc. \u00c1nh s\u00e1ng tr\u1eafng t\u1eeb m\u1eb7t tr\u1eddi s\u1ebd ph\u1ea3n x\u1ea1, kh\u00fac x\u1ea1 v\u00e0 l\u1eb7p \u0111i l\u1eb7p l\u1ea1i trong gi\u1ecdt n\u01b0\u1edbc tr\u01b0\u1edbc khi ch\u1ea1m v\u00e0o m\u1eaft ch\u00fang ta. V\u00e0 m\u1ed7i m\u00e0u s\u1eafc c\u1ee7a \u00e1nh s\u00e1ng s\u1ebd b\u1ecb kh\u00fac x\u1ea1 \u1edf g\u00f3c \u0111\u1ed9 kh\u00e1c nhau, t\u1ea1o th\u00e0nh c\u1ea7u v\u1ed3ng m\u00e0 ch\u00fang ta th\u1ea5y.<\/p>\n

B\u1eadt m\u00ed<\/strong>: Ngo\u00e0i 7 m\u00e0u s\u1eafc c\u01a1 b\u1ea3n, c\u1ea7u v\u1ed3ng c\u00f2n bao g\u1ed3m nh\u1eefng m\u00e0u t\u00e1n s\u1eafc kh\u00e1c. Th\u1eadt ra, c\u1ea7u v\u1ed3ng \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb h\u01a1n m\u1ed9t tri\u1ec7u m\u00e0u s\u1eafc li\u00ean ti\u1ebfp<\/em>. M\u1ed7i d\u1ea3i m\u00e0u trong c\u1ea7u v\u1ed3ng l\u00e0 m\u1ed9t m\u00e0u t\u00e1n s\u1eafc ph\u1ee9c t\u1ea1p, \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh t\u1eeb s\u1ef1 k\u1ebft h\u1ee3p c\u1ee7a nhi\u1ec1u m\u00e0u s\u1eafc kh\u00e1c nhau.
\nV\u1eady n\u00ean, 1 c\u1ea7u v\u1ed3ng c\u00f3 ch\u1ee9a h\u01a1n 7 m\u00e0u s\u1eafc, nh\u01b0ng ch\u00fang ta th\u01b0\u1eddng nh\u1eadn bi\u1ebft v\u00e0 ghi nh\u1edb 7 m\u00e0u s\u1eafc c\u01a1 b\u1ea3n c\u1ee7a c\u1ea7u v\u1ed3ng l\u00e0 \u0111\u1ecf, cam, v\u00e0ng, l\u1ee5c, lam, ch\u00e0m v\u00e0 t\u00edm.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n

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C\u1ea7u v\u1ed3ng th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n \u1edf \u0111\u00e2u v\u1eady?<\/strong><\/h2>\n

C\u1ea7u v\u1ed3ng th\u01b0\u1eddng xu\u1ea5t hi\u1ec7n sau nh\u1eefng tr\u1eadn m\u01b0a khi \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi chi\u1ebfu v\u00e0o nh\u1eefng gi\u1ecdt n\u01b0\u1edbc m\u01b0a c\u00f2n l\u1ea1i trong kh\u00f4ng kh\u00ed<\/em>. \u0110\u1ec3 nh\u00ecn th\u1ea5y c\u1ea7u v\u1ed3ng, c\u1ea7n \u0111\u1ee9ng \u1edf v\u1ecb tr\u00ed m\u00e0 m\u1eb7t tr\u1eddi \u1edf sau l\u01b0ng v\u00e0 c\u00e1c gi\u1ecdt n\u01b0\u1edbc m\u01b0a \u1edf ph\u00eda tr\u01b0\u1edbc. <\/p>\n

T\u1ea1i sao c\u1ea7u v\u1ed3ng c\u00f3 h\u00ecnh d\u1ea1ng cong? <\/strong>
\nHi\u1ec3u \u0111\u01a1n gi\u1ea3n th\u1ebf n\u00e0y nh\u00e9, gi\u1ecdt n\u01b0\u1edbc c\u00f3 h\u00ecnh tr\u00f2n gi\u1ed1ng nh\u01b0 m\u1ed9t qu\u1ea3 b\u00f3ng. Khi \u00e1nh s\u00e1ng \u0111i qua qu\u1ea3 b\u00f3ng, n\u00f3 s\u1ebd b\u1ecb b\u1ebb cong theo m\u1ed9t \u0111\u01b0\u1eddng cong. T\u1ea5t c\u1ea3 nh\u1eefng gi\u1ecdt n\u01b0\u1edbc nh\u1ecf li ti trong kh\u00f4ng kh\u00ed, khi b\u1ecb \u00e1nh s\u00e1ng chi\u1ebfu v\u00e0o, \u0111\u1ec1u t\u1ea1o ra nh\u1eefng \u0111\u01b0\u1eddng cong nh\u1ecf. Khi nh\u00ecn t\u1eeb xa, h\u00e0ng tri\u1ec7u \u0111\u01b0\u1eddng cong nh\u1ecf n\u00e0y gh\u00e9p l\u1ea1i v\u1edbi nhau t\u1ea1o th\u00e0nh m\u1ed9t v\u00f2ng cung l\u1edbn, \u0111\u00f3 ch\u00ednh l\u00e0 c\u1ea7u v\u1ed3ng m\u00e0 ch\u00fang ta nh\u00ecn th\u1ea5y.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t

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C\u1ea7u v\u1ed3ng \u0111\u00f4i<\/strong><\/h2>\n

C\u1ea7u v\u1ed3ng \u0111\u00f4i kh\u00f4ng ch\u1ec9 hi\u1ebfm g\u1eb7p m\u00e0 c\u00f2n l\u00e0 m\u1ed9t trong nh\u1eefng hi\u1ec7n t\u01b0\u1ee3ng phi th\u01b0\u1eddng m\u00e0 thi\u00ean nhi\u00ean t\u1ea1o ra.
\nNh\u01b0 \u0111\u00e3 \u0111\u1ec1 c\u1eadp \u1edf ph\u1ea7n tr\u01b0\u1edbc, khi \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi chi\u1ebfu v\u00e0o m\u1ed9t gi\u1ecdt n\u01b0\u1edbc m\u01b0a, n\u00f3 s\u1ebd b\u1ecb b\u1ebb cong (kh\u00fac x\u1ea1) v\u00e0 ph\u00e2n t\u00e1ch th\u00e0nh c\u00e1c m\u00e0u s\u1eafc kh\u00e1c nhau. Sau \u0111\u00f3, \u00e1nh s\u00e1ng n\u00e0y s\u1ebd b\u1ecb ph\u1ea3n x\u1ea1 m\u1ed9t l\u1ea7n b\u00ean trong gi\u1ecdt n\u01b0\u1edbc v\u00e0 tho\u00e1t ra ngo\u00e0i t\u1ea1o th\u00e0nh c\u1ea7u v\u1ed3ng m\u00e0 ch\u00fang ta th\u01b0\u1eddng th\u1ea5y, \u0111\u00e2y l\u00e0 c\u1ea7u v\u1ed3ng ch\u00ednh. C\u00f2n c\u1ea7u v\u1ed3ng th\u1ee9 hai m\u1edd h\u01a1n s\u1ebd xu\u1ea5t hi\u1ec7n \u1edf b\u00ean ngo\u00e0i c\u1ea7u v\u1ed3ng ch\u00ednh, c\u00f3 th\u1ee9 t\u1ef1 m\u00e0u ng\u01b0\u1ee3c l\u1ea1i so v\u1edbi c\u1ea7u v\u1ed3ng ch\u00ednh, \u0111\u01b0\u1ee3c h\u00ecnh th\u00e0nh khi \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi b\u1ecb ph\u1ea3n x\u1ea1 hai l\u1ea7n<\/em><\/strong> b\u00ean trong gi\u1ecdt n\u01b0\u1edbc tr\u01b0\u1edbc khi tho\u00e1t ra ngo\u00e0i.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n\n\t

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Th\u00ed nghi\u1ec7m c\u1ea7u v\u1ed3ng nh\u00e2n t\u1ea1o t\u1ea1i nh\u00e0<\/strong><\/h2>\n

B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o ra c\u1ea7u v\u1ed3ng nh\u00e2n t\u1ea1o t\u1ea1i nh\u00e0 v\u1edbi m\u1ed9t s\u1ed1 v\u1eadt li\u1ec7u \u0111\u01a1n gi\u1ea3n:
– M\u1ed9t c\u00e1i b\u00ecnh n\u01b0\u1edbc.
– M\u1ed9t t\u1ea5m g\u01b0\u01a1ng nh\u1ecf.
– M\u1ed9t ngu\u1ed3n s\u00e1ng m\u1ea1nh (\u0111\u00e8n pin ho\u1eb7c \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi).<\/p>\n

C\u00e1ch th\u1ef1c hi\u1ec7n:<\/strong>
– \u0110\u1ed5 n\u01b0\u1edbc v\u00e0o b\u00ecnh \u0111\u1ebfn khi g\u1ea7n \u0111\u1ea7y.
– \u0110\u1eb7t t\u1ea5m g\u01b0\u01a1ng v\u00e0o trong b\u00ecnh n\u01b0\u1edbc, nghi\u00eang m\u1ed9t g\u00f3c kho\u1ea3ng 45 \u0111\u1ed9.
– Chi\u1ebfu \u00e1nh s\u00e1ng m\u1ea1nh v\u00e0o t\u1ea5m g\u01b0\u01a1ng qua n\u01b0\u1edbc.<\/p>\n

Khi \u00e1nh s\u00e1ng \u0111i qua n\u01b0\u1edbc v\u00e0 ph\u1ea3n x\u1ea1 tr\u00ean t\u1ea5m g\u01b0\u01a1ng, n\u00f3 s\u1ebd b\u1ecb ph\u00e2n t\u00e1n v\u00e0 t\u1ea1o ra c\u00e1c m\u00e0u s\u1eafc c\u1ee7a c\u1ea7u v\u1ed3ng tr\u00ean b\u1ec1 m\u1eb7t t\u01b0\u1eddng ho\u1eb7c tr\u00ean m\u1eb7t \u0111\u1ea5t.<\/p>\n\n\t\t<\/div>\n\t<\/div>\n

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M\u1ed9t S\u1ed1 C\u00e2u H\u1ecfi Th\u01b0\u1eddng G\u1eb7p V\u1ec1 \u0110\u1ed1 Vui B\u1eb1ng Ti\u1ebfng Anh (FAQ)<\/strong><\/h2>\n

1. L\u00e0m th\u1ebf n\u00e0o \u0111\u1ec3 t\u00ecm th\u1ea5y c\u1ea7u v\u1ed3ng?<\/em><\/strong>
\u0110\u1ec3 t\u00ecm th\u1ea5y c\u1ea7u v\u1ed3ng, b\u1ea1n c\u1ea7n:
– M\u1ed9t ng\u00e0y c\u00f3 m\u01b0a v\u00e0 n\u1eafng: Sau c\u01a1n m\u01b0a, khi tr\u1eddi b\u1eaft \u0111\u1ea7u quang \u0111\u00e3ng v\u00e0 c\u00f3 \u00e1nh n\u1eafng chi\u1ebfu qua nh\u1eefng \u0111\u00e1m m\u00e2y, b\u1ea1n s\u1ebd c\u00f3 c\u01a1 h\u1ed9i nh\u00ecn th\u1ea5y c\u1ea7u v\u1ed3ng.
– T\u00ecm m\u1ed9t v\u1ecb tr\u00ed c\u00f3 nhi\u1ec1u gi\u1ecdt n\u01b0\u1edbc: \u0110\u1ee9ng \u1edf m\u1ed9t v\u1ecb tr\u00ed c\u00f3 nhi\u1ec1u gi\u1ecdt n\u01b0\u1edbc nh\u01b0 g\u1ea7n th\u00e1c n\u01b0\u1edbc, v\u00f2i phun n\u01b0\u1edbc ho\u1eb7c th\u1eadm ch\u00ed l\u00e0 m\u1ed9t v\u00f2i n\u01b0\u1edbc \u0111ang ch\u1ea3y.
– M\u1eb7t tr\u1eddi \u1edf ph\u00eda sau b\u1ea1n: \u0110\u1ec3 nh\u00ecn th\u1ea5y c\u1ea7u v\u1ed3ng, m\u1eb7t tr\u1eddi ph\u1ea3i \u1edf ph\u00eda sau b\u1ea1n v\u00e0 t\u1ea1o th\u00e0nh m\u1ed9t g\u00f3c kho\u1ea3ng 42 \u0111\u1ed9 so v\u1edbi m\u1eb7t \u0111\u1ea5t.<\/p>\n

2. C\u00f3 th\u1ec3 ch\u1ea1m v\u00e0o c\u1ea7u v\u1ed3ng kh\u00f4ng?<\/em><\/strong>
C\u1ea7u v\u1ed3ng kh\u00f4ng ph\u1ea3i l\u00e0 m\u1ed9t v\u1eadt th\u1ec3 c\u00f3 h\u00ecnh d\u1ea1ng c\u1ee5 th\u1ec3 m\u00e0 l\u00e0 m\u1ed9t hi\u1ec7n t\u01b0\u1ee3ng quang h\u1ecdc. V\u00ec v\u1eady, ch\u00fang ta kh\u00f4ng th\u1ec3 ch\u1ea1m v\u00e0o n\u00f3.<\/p>\n

3. C\u00f3 th\u1ec3 nh\u00ecn th\u1ea5y c\u1ea7u v\u1ed3ng v\u00e0o ban \u0111\u00eam kh\u00f4ng? <\/em><\/strong>
Kh\u00f4ng, ch\u00fang ta kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y c\u1ea7u v\u1ed3ng v\u00e0o ban \u0111\u00eam v\u00ec c\u1ea7n c\u00f3 \u00e1nh s\u00e1ng m\u1eb7t tr\u1eddi \u0111\u1ec3 t\u1ea1o ra c\u1ea7u v\u1ed3ng.<\/p>\n