{"id":303922,"date":"2024-01-07T13:30:55","date_gmt":"2024-01-07T06:30:55","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=303922"},"modified":"2024-01-07T13:30:55","modified_gmt":"2024-01-07T06:30:55","slug":"1-nam-anh-sang-bang-bao-nhieu-km","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/1-nam-anh-sang-bang-bao-nhieu-km\/","title":{"rendered":"M\u1ed9t n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km, bao nhi\u00eau n\u0103m Tr\u00e1i \u0110\u1ea5t"},"content":{"rendered":"

1 n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km? \u0110\u00e2y l\u00e0 m\u1ed9t \u0111\u01a1n v\u1ecb \u0111\u01b0\u1ee3c d\u00f9ng ph\u1ed5 bi\u1ebfn trong vi\u1ec7c \u0111o l\u01b0\u1eddng kho\u1ea3ng c\u00e1ch \u1edf gi\u1eefa nh\u1eefng h\u00e0nh tinh hay nh\u1eefng ng\u00f4i sao tr\u00ean v\u0169 tr\u1ee5. N\u1ebfu b\u1ea1n th\u00edch nghi\u00ean c\u1ee9u v\u1ec1 nh\u1eefng \u0111i\u1ec1u th\u00fa v\u1ecb trong v\u0169 tr\u1ee5 th\u00ec c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam v\u1ec1 \u0111\u01a1n v\u1ecb n\u00e0y \u1edf b\u00e0i vi\u1ebft sau.\u00a0<\/span><\/p>\n

N\u0103m \u00e1nh s\u00e1ng c\u00f3 ngh\u0129a l\u00e0 g\u00ec?<\/span><\/h2>\n

Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u 1 n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km th\u00ec m\u1ecdi ng\u01b0\u1eddi ph\u1ea3i t\u00ecm hi\u1ec3u v\u1ec1 kh\u00e1i ni\u1ec7m n\u0103m \u00e1nh s\u00e1ng. \u0110\u00e2y l\u00e0 \u0111\u01a1n v\u1ecb d\u00f9ng \u0111\u1ec3 \u0111o l\u01b0\u1eddng kho\u1ea3ng c\u00e1ch gi\u1eefa nh\u1eefng nh\u00e2n t\u1ed1 trong v\u0169 tr\u1ee5. Theo ti\u1ebfng Anh th\u00ec n\u0103m \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 Light Year.\u00a0<\/span><\/p>\n

Light Year \u0111\u01b0\u1ee3c t\u00ednh d\u1ef1a tr\u00ean qu\u00e3ng \u0111\u01b0\u1eddng \u00e1nh s\u00e1ng di chuy\u1ec3n \u0111\u01b0\u1ee3c trong m\u1ed9t n\u0103m. Theo IAU th\u00ec n\u0103m \u00e1nh s\u00e1ng \u0111\u01b0\u1ee3c hi\u1ec3u nh\u01b0 kho\u1ea3ng c\u00e1ch truy\u1ec1n \u0111i trong m\u00f4i tr\u01b0\u1eddng ch\u00e2n kh\u00f4ng trong v\u00f2ng 1 n\u0103m Julius, ngh\u0129a l\u00e0 365 ng\u00e0y. \u0110i\u1ec1u n\u00e0y l\u00e0m nhi\u1ec1u ng\u01b0\u1eddi b\u1ecb nh\u1ea7m l\u00e0 \u0111\u01a1n v\u1ecb d\u00f9ng \u0111\u1ec3 t\u00ednh c\u1ee7a n\u0103m \u00e1nh s\u00e1ng l\u00e0 ch\u1eef \u201c n\u0103m\u201d trong \u0111\u1ecbnh ngh\u0129a.<\/span><\/p>\n

\"1-nam-anh-sang-bang-bao-nhieu-km-1\"<\/picture>
N\u0103m \u00e1nh s\u00e1ng c\u00f3 ngh\u0129a l\u00e0 g\u00ec?<\/figcaption><\/figure>\n

De Rham \u0111\u00e3 kh\u1eb3ng \u0111\u1ecbnh r\u1eb1ng ch\u1ec9 t\u1ed3n t\u1ea1i m\u1ed9t th\u1ee9 c\u00f3 th\u1ec3 truy\u1ec1n \u0111i nhanh h\u01a1n t\u1ed1c \u0111\u1ed9 c\u1ee7a \u00e1nh s\u00e1ng, \u0111\u00f3 ch\u00ednh l\u00e0 \u00e1nh s\u00e1ng. Nh\u01b0ng l\u1eddi kh\u1eb3ng \u0111\u1ecbnh n\u00e0y ch\u1ec9 \u0111\u00fang n\u1ebfu x\u00e9t trong ch\u00e2n kh\u00f4ng c\u1ee7a v\u0169 tr\u1ee5. \u00c1nh s\u00e1ng ch\u00ednh l\u00e0 y\u1ebfu t\u1ed1 c\u00f3 th\u1ec3 truy\u1ec1n \u0111i nhanh nh\u1ea5t v\u0169 tr\u1ee5.\u00a0<\/span><\/p>\n

\u00c1nh s\u00e1ng c\u00f3 kh\u1ea3 n\u0103ng truy\u1ec1n \u0111i c\u00f9ng t\u1ed1c \u0111\u1ed9 l\u00e0 300.000km\/ gi\u00e2y. Con s\u1ed1 n\u00e0y r\u1ea5t cao v\u00e0 ph\u1ea3n \u00e1nh \u0111\u00fang v\u1eadn t\u1ed1c di chuy\u1ec3n nhanh c\u1ee7a n\u00f3. C\u00f3 th\u1ec3 n\u00f3i l\u00e0 \u00e1nh s\u00e1ng s\u1ebd m\u1ea5t m\u1ed9t gi\u00e2y \u0111\u1ec3 \u0111i \u0111\u01b0\u1ee3c 7,5 l\u1ea7n xung quanh x\u00edch \u0111\u1ea1o c\u1ee7a Tr\u00e1i \u0110\u1ea5t. Vi\u1ec7c n\u00e0y c\u0169ng ch\u1ec9 ra r\u1eb1ng n\u0103m \u00e1nh s\u00e1ng th\u1ec3 hi\u1ec7n m\u1ed9t kho\u1ea3ng c\u00e1ch r\u1ea5t l\u1edbn.\u00a0<\/span><\/p>\n

C\u00e1ch quy \u0111\u1ed5i \u0111\u01a1n v\u1ecb n\u0103m \u00e1nh s\u00e1ng<\/span><\/h2>\n

Hai c\u00e2u h\u1ecfi sau s\u1ebd gi\u00fap m\u1ecdi ng\u01b0\u1eddi gi\u1ea3i \u0111\u00e1p r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch quy \u0111\u1ed5i \u0111\u01a1n v\u1ecb n\u0103m \u00e1nh s\u00e1ng hi\u1ec7n nay:<\/span><\/p>\n

1 n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km?<\/span><\/h3>\n

1 Light Year x\u1ea5p x\u1ec9 b\u1eb1ng 9,5 ngh\u00ecn t\u1ef7 km ( ch\u00ednh x\u00e1c l\u00e0 9.460.528.400.000km) v\u00e0 b\u1eb1ng 5.878.499.810.000 d\u1eb7m. Th\u1ef1c t\u1ebf th\u00ec nh\u1eefng \u0111\u01a1n v\u1ecb d\u00f9ng \u0111\u1ec3 \u0111o l\u01b0\u1eddng trong thi\u00ean v\u0103n ph\u1ea3i d\u00f9ng \u0111\u1ebfn nh\u1eefng \u0111\u01a1n v\u1ecb nh\u01b0 h\u00e0ng t\u1ef7, h\u00e0ng tri\u1ec7u, h\u00e0ng tr\u0103m n\u0103m \u00e1nh s\u00e1ng.\u00a0<\/span><\/p>\n

V\u1eady m\u1ed9t tri\u1ec7u Light Year c\u00f3 th\u1ec3 quy \u0111\u1ed5i ra m\u1ea5y km?\u00a0<\/span><\/p>\n

\u0110\u00e1p \u00e1n: 9.460.528.400.000 x 1.000.000 = X\u1ea5p x\u1ec9 9,5 tri\u1ec7u t\u1ef7 km<\/span><\/p>\n

T\u01b0\u01a1ng t\u1ef1 n\u1ebfu b\u1ea1n mu\u1ed1n t\u00ednh to\u00e1n m\u1ed9t t\u1ef7 n\u0103m \u00e1nh s\u00e1ng ra m\u1ea5y km th\u00ec b\u1ea1n c\u00f3 th\u1ec3 t\u00ednh to\u00e1n nh\u01b0 sau:\u00a0<\/span><\/p>\n

9.460.528.400.000 x 1000.000.000 = X\u1ea5p x\u1ec9 9,5 t\u1ef7 t\u1ef7 km\u00a0<\/span><\/p>\n

\"1-nam-anh-sang-bang-bao-nhieu-km-2\"<\/picture>
1 n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km?<\/figcaption><\/figure>\n

M\u1ed9t n\u0103m \u00e1nh s\u00e1ng s\u1ebd b\u1eb1ng m\u1ea5y n\u0103m Tr\u00e1i \u0110\u1ea5t?<\/span><\/h3>\n

C\u00e1ch quy \u0111\u1ed5i n\u00e0y t\u01b0\u01a1ng t\u1ef1 nh\u01b0 vi\u1ec7c b\u1ea1n bi\u1ebft kho\u1ea3ng c\u00e1ch, v\u1eadn t\u1ed1c th\u00ec b\u1ea1n s\u1ebd t\u00ecm \u0111\u01b0\u1ee3c th\u1eddi gian. Khi ch\u00fang ta bi\u1ebft v\u1eadn t\u1ed1c c\u1ee7a \u00e1nh s\u00e1ng khi truy\u1ec1n \u1edf m\u00f4i tr\u01b0\u1eddng v\u0169 tr\u1ee5 kho\u1ea3ng 300.000km\/ gi\u00e2y th\u00ec ch\u00fang ta ch\u1ec9 c\u1ea7n d\u00f9ng k\u00ednh thi\u00ean v\u0103n v\u00e0 t\u00ednh to\u00e1n \u0111\u1ec3 t\u00ednh kho\u1ea3ng c\u00e1ch gi\u1eefa nh\u1eefng v\u1eadt th\u1ec3. T\u1eeb \u0111\u00f3 ch\u00fang ta s\u1ebd t\u00ecm ra \u0111\u01b0\u1ee3c th\u1eddi gian m\u00e0 \u00e1nh s\u00e1ng di chuy\u1ec3n t\u1eeb m\u1ed9t v\u1eadt th\u1ec3 n\u00e0y t\u1edbi Tr\u00e1i \u0110\u1ea5t l\u00e0 bao l\u00e2u.<\/span><\/p>\n

Trong m\u1ed9t v\u00ed d\u1ee5 g\u1ea7n \u0111\u00e2y, nh\u00e0 khoa h\u1ecdc \u0111\u00e3 nh\u00ecn th\u1ea5y 1 v\u1ee5 n\u1ed5 c\u1ee7a c\u00e1c h\u00e0nh tinh. N\u00f3 di\u1ec5n ra c\u00e1ch \u0111\u00e2y kho\u1ea3ng 2.5 tri\u1ec7u n\u0103m v\u00e0 \u0111\u00f3 l\u00e0 giai \u0111o\u1ea1n kh\u1edfi \u0111\u1ea7u K\u1ef7 B\u0103ng H\u00e0. Th\u1ee9 m\u00e0 h\u1ecd nh\u00ecn th\u1ea5y t\u1eeb v\u1ee5 n\u1ed5 n\u00e0y ch\u00ednh l\u00e0 \u00e1nh s\u00e1ng c\u00e1ch \u0111\u00e2y 2.5 tri\u1ec7u n\u0103m.<\/span><\/p>\n

M\u1ed9t n\u0103m \u00e1nh s\u00e1ng ph\u1ea3i \u0111i trong bao l\u00e2u?<\/span><\/h2>\n

Khi \u0111\u00e3 t\u00ecm hi\u1ec3u 1 n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km th\u00ec ch\u00fang ta c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u th\u00eam 1 Light Year ph\u1ea3i \u0111i trong bao l\u00e2u? N\u1ebfu ch\u00fang ta di chuy\u1ec3n v\u1edbi v\u1eadn t\u1ed1c l\u00e0 20 ph\u00fat trong m\u1ed7i d\u1eb7m (ngh\u0129a l\u00e0 20 ph\u00fat\/1.609344 km), ch\u00fang ta ph\u1ea3i \u0111i g\u1ea7n 225 tri\u1ec7u n\u0103m th\u00ec m\u1edbi ho\u00e0n th\u00e0nh ch\u1eb7ng \u0111\u01b0\u1eddng 1 n\u0103m \u00e1nh s\u00e1ng.\u00a0<\/span><\/p>\n

\"1-nam-anh-sang-bang-bao-nhieu-km-3\"<\/picture>
M\u1ed9t n\u0103m \u00e1nh s\u00e1ng ph\u1ea3i \u0111i trong bao l\u00e2u?<\/figcaption><\/figure>\n

V\u00ec ch\u1eb7ng \u0111\u01b0\u1eddng m\u00e0 \u00e1nh s\u00e1ng di chuy\u1ec3n gi\u1eefa nh\u1eefng thi\u00ean th\u1ec3 hi\u1ec7n nay r\u1ea5t l\u1edbn. Cho n\u00ean nh\u1eefng nghi\u00ean c\u1ee9u v\u1ec1 v\u0169 tr\u1ee5 \u0111\u1ebfn nay c\u00f2n g\u1eb7p nhi\u1ec1u th\u1eed th\u00e1ch v\u00e0 \u0111ang c\u00f2n nhi\u1ec1u c\u00e2u h\u1ecfi ch\u01b0a c\u00f3 l\u1eddi gi\u1ea3i \u0111\u00e1p.<\/span><\/p>\n

Chi\u1ebfc t\u00e0u \u0111i v\u00e0o v\u0169 tr\u1ee5 c\u1ee7a NASA c\u00f3 v\u1eadn t\u1ed1c 265.000 km\/ gi\u1edd d\u1ef1a v\u00e0o l\u1ef1c h\u1ea5p d\u1eabn kh\u1ee7ng t\u1eeb nh\u1eefng h\u00e0nh tinh nh\u01b0ng \u0111\u1ebfn nay n\u00f3 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 l\u00e0 qu\u00e1 nh\u1ecf n\u1ebfu so v\u1edbi v\u1eadn t\u1ed1c c\u1ee7a \u00e1nh s\u00e1ng.\u00a0<\/span><\/p>\n

V\u00ec sao l\u1ea1i d\u00f9ng \u00e1nh s\u00e1ng trong l\u0129nh v\u1ef1c thi\u00ean v\u0103n?<\/span><\/h2>\n

Ngo\u00e0i b\u0103n kho\u0103n 1 n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km, nhi\u1ec1u ng\u01b0\u1eddi hi\u1ec7n nay v\u1eabn b\u0103n kho\u0103n v\u00ec sao h\u1ecd th\u1ea5y r\u1ea5t r\u00f5 \u00e1nh s\u00e1ng c\u1ee7a m\u1eb7t tr\u1eddi ho\u1eb7c nh\u1eefng v\u00ec sao m\u1eb7c d\u00f9 \u1edf kho\u1ea3ng c\u00e1ch qu\u00e1 xa. Con s\u1ed1 \u0111o l\u01b0\u1eddng kho\u1ea3ng c\u00e1ch dao \u0111\u1ed9ng kho\u1ea3ng h\u00e0ng t\u1ef7, h\u00e0ng ngh\u00ecn n\u0103m \u00e1nh s\u00e1ng. Nh\u01b0ng con ng\u01b0\u1eddi v\u1eabn th\u1ea5y \u0111\u01b0\u1ee3c ch\u00fang b\u1eb1ng m\u1eaft th\u01b0\u1eddng.<\/span><\/p>\n

\"1-nam-anh-sang-bang-bao-nhieu-km-4\"<\/picture>
V\u00ec sao l\u1ea1i d\u00f9ng \u00e1nh s\u00e1ng trong l\u0129nh v\u1ef1c thi\u00ean v\u0103n?<\/figcaption><\/figure>\n

Tr\u00ean th\u1ef1c t\u1ebf th\u00ec M\u1eb7t Tr\u1eddi ch\u1ec9 c\u00e1ch xa Tr\u00e1i \u0110\u1ea5t kho\u1ea3ng 150 tri\u1ec7u km. Theo c\u00e1c ph\u00e9p \u0111o l\u01b0\u1eddng th\u00ec m\u1ed9t tia \u00e1nh s\u00e1ng l\u00fac ph\u00e1t ra ch\u1ec9 c\u1ea7n m\u1ea5t 8,19 ph\u00fat \u0111\u1ec3 t\u1edbi Tr\u00e1i \u0110\u1ea5t. B\u1edfi v\u1eady m\u00e0 \u00e1nh s\u00e1ng m\u1ecdi ng\u01b0\u1eddi nh\u00ecn r\u00f5 b\u1eb1ng m\u1eaft th\u01b0\u1eddng th\u00ec \u0111\u00f3 l\u00e0 tia s\u00e1ng c\u1ee7a M\u1eb7t Tr\u1eddi v\u00e0 ch\u1ec9 c\u00e1ch kho\u1ea3ng 8 ph\u00fat. V\u00ec v\u1eady m\u00e0 kho\u1ea3ng c\u00e1ch \u1edf gi\u1eefa nh\u1eefng thi\u00ean th\u1ec3 trong v\u0169 tr\u1ee5 l\u00e0 r\u1ea5t xa. N\u1ebfu b\u1ea1n ch\u1ec9 d\u00f9ng nh\u1eefng ch\u1ec9 s\u1ed1 \u0111o l\u01b0\u1eddng b\u00ecnh th\u01b0\u1eddng th\u00ec v\u1ea5n \u0111\u1ec1 \u0111o \u0111\u1ea1c ch\u00ednh x\u00e1c l\u00e0 kh\u00f3 x\u1ea3y ra.<\/span><\/p>\n

B\u1edfi v\u1eady khi \u0111o l\u01b0\u1eddng kho\u1ea3ng c\u00e1ch gi\u1eefa nh\u1eefng v\u00ec sao th\u00ec ch\u00fang ta kh\u00f4ng \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ebfn km hay d\u1eb7m. N\u1ebfu ch\u00fang ta ch\u1ec9 d\u00f9ng \u0111\u01a1n v\u1ecb \u0111\u1ec3 \u0111o l\u01b0\u1eddng l\u00e0 kilomet th\u00ec con s\u1ed1 kho\u1ea3ng c\u00e1ch l\u1ea1i r\u1ea5t l\u1edbn n\u00ean kh\u00f4ng \u0111\u1ee7 \u0111\u1ec3 t\u00ednh to\u00e1n v\u1edbi \u0111\u01a1n v\u1ecb n\u00e0y. V\u00ec v\u1eady m\u00e0 nh\u1eefng nh\u00e0 thi\u00ean v\u0103n h\u1ecdc s\u1ebd s\u1eed d\u1ee5ng \u0111\u01a1n v\u1ecb Light Year trong vi\u1ec7c t\u00ednh to\u00e1n nh\u1eefng c\u1ef1 ly gi\u1eefa nh\u1eefng thi\u00ean th\u1ec3 trong v\u0169 tr\u1ee5.<\/span><\/p>\n

S\u1ef1 ki\u1ec7n l\u1ecbch s\u1eed li\u00ean quan \u0111\u1ebfn n\u0103m \u00e1nh s\u00e1ng\u00a0<\/span><\/h2>\n

Trong n\u1ed9i dung \u0111\u1ec1 c\u1eadp \u1edf tr\u00ean th\u00ec ch\u00fang ta \u0111\u00e3 bi\u1ebft \u0111\u01b0\u1ee3c 1 n\u0103m \u00e1nh s\u00e1ng b\u1eb1ng bao nhi\u00eau km? Sau \u0111\u00e2y l\u00e0 m\u1ed9t v\u00e0i s\u1ef1 ki\u1ec7n li\u00ean quan \u0111\u1ebfn n\u0103m \u00e1nh s\u00e1ng m\u00e0 l\u1ecbch s\u1eed \u0111\u00e3 ghi nh\u1eadn:<\/span><\/p>\n

\"1-nam-anh-sang-bang-bao-nhieu-km-5\"<\/picture>
S\u1ef1 ki\u1ec7n l\u1ecbch s\u1eed li\u00ean quan \u0111\u1ebfn n\u0103m \u00e1nh s\u00e1ng<\/figcaption><\/figure>\n