2007-08-15 10:22:01 · 14 answers · asked by S.G. S 1 in Science & Mathematics ➔ Physics
obinna
The speed of light is approximately 30000000000m/s or 186000miles/s
2007-08-18 04:10:19 · answer #1 · answered by Emperor 3 · 0⤊ 0⤋
en.wikipedia.org/wiki/Speed_of
he speed of light in vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning "swiftness".[1] It is the speed of all electromagnetic radiation, including visible light, in a vacuum. More generally, it is the speed of anything with zero rest mass.
In metric units, c is exactly 299,792,458 metres per second (1,079,252,848.8 km/h).[2] The fundamental SI unit of length, the metre, has been defined since October 21, 1983, as the distance light travels in a vacuum in 1/299,792,458 of a second; any increase in the precision of the measurement of the speed of light would refine the definition of the metre, but not alter the numerical value of c. The approximate value of 3Ã108 m/s is commonly used in rough estimates. In imperial units, the speed of light is 983, 571, 056 feet per second, which is about 186,282.397 miles per second, or roughly one foot per nanosecond.
2007-08-16 12:23:30 · answer #2 · answered by chanljkk 7 · 0⤊ 0⤋
Only in a vacuum does light reach it's maximum speed 186.282 mps. otherwise it varies, depending on what it's travelling through. In 2000 a team at Harvard managed to bring light to a complete standstill.
2007-08-15 10:31:05 · answer #3 · answered by keeprockin 7 · 0⤊ 0⤋
Speed of Light
186282.397 Miles per secone
799792.458 Kilometers per second
Click on the link below
en.wikipedia.org/wiki/Speed_of_light
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2007-08-15 10:30:37 · answer #4 · answered by SAMUEL D 7 · 1⤊ 0⤋
The following answer is the speed of light, c, in a vacuum:
in metres per second:
299,792,458 m/s
[299 million, 792 thousand, 4 hundred and 58]
in kilometres per second:
299,792.5 km/s
[299 thousand, 7 hundred and 92]
in metres per hour:
1,679,252,848,800 m/hr
[1 trillion, 679 billion, 252 million, 848 thousand 8 hundred]
in kilometres per hour:
1,679,252,848.8 km/hr
[1 billion, 679 million, 252 thousand 8 hundred and 48]
in feet per second:
983,571,056 ft/s
[983 million, 571 thousand and 56]
in miles per second:
186,282.4 miles/s
[186 thousand, 2 hundred and 82]
in feet per hour:
3,540,855,800,000 ft/hr
[3 trillion, 540 billion, 855 million, 800 thousand]
in miles per hour:
670,616,629 miles/hr
[670 billion, 616 million, 6 hundred and 29]
The speed of light, v, in a material of refractive index, n, is:
v = c/n where c is the speed of light in a vacuum.
2007-08-15 15:22:56 · answer #5 · answered by Afro-G 1 · 1⤊ 1⤋
For some reason, 186,282.396 miles per second sticks in my mind, +/- a few meters per second.
(Yeah, I know... I'm mixing units, but that's the way I read it somewhere.)
2007-08-15 10:29:25 · answer #6 · answered by Sam84 5 · 0⤊ 0⤋
186,282 Miles per second
11,176,944 Miles per minute
670,616,629 Miles per hour
16,094,799,101 Miles per day
112,663,593,706 Miles per week
5,858,506,872,691 Miles per year
So a light year is about 5,858,506,872,691 miles That's nearly 6 TRILLION miles!
2007-08-15 10:30:47 · answer #7 · answered by Anonymous · 0⤊ 0⤋
186, 242 miles per second, in a vacuum.
It's not just a good idea, it's the law.
2007-08-15 10:26:15 · answer #8 · answered by comicards 6 · 0⤊ 0⤋
186,282 miles per second
or
299,792,458 meters per second
2007-08-15 10:25:37 · answer #9 · answered by rbc_commish 3 · 1⤊ 0⤋
186,000 miles per second
2007-08-15 10:24:59 · answer #10 · answered by Anonymous · 0⤊ 0⤋