what is the speed of light if it is designated in MPH ?

Answer 1

670,616,629.384 mph

wow

Answer 2

The speed of light in a vacuum is an important physical constant denoted by the letter c for constant or the Latin word celeritas meaning "swiftness". Through any transparent or translucent material medium like glass or air, light travels more slowly than c, its speed in a vacuum; the ratio of c to this slower speed is called the refractive index of the medium.

In metric units, c is exactly 299,792,458 metres per second. Note that this speed is a definition, not a measurement, since the fundamental SI unit of length, the metre, has been defined since October 21, 1983 in terms of the speed of light—one metre is the distance light travels in a vacuum in 1/299,792,458 of a second. Converted to imperial units, the speed of light is approximately 670,616,629.384 miles per hour.

Answer 3

670,616,629 mph. Pretty damn fast. It still takes it 9 minutes to get here from the sun though, which gives you an idea of just how big the universe is.

Answer 4

669600000 MPH

Answer 5

The speed of light is the following:

Approx 3 x 10^8 m/s (300,000,000 m/s)

or exactly 299,792,458 metres per second.

or 186,282.397 miles per second,

or 670,616,629.384 miles per hour

Answer 6

Try Google

Answer 7

The speed of light = 670,616,629 mph

http://www.google.com/search?sourceid=navclient&ie=UTF-8&rls=SUNA,SUNA:2006-06,SUNA:en&q=speed+of+light+in+mph

--Rob :)~

Answer 8

186,000 miles per second got a cool book you might want to read if you like space and stuff...."A brief history of time" Stephen Hawkin, have a good one ;o)

Answer 9

186,000 miles per second....that's the only measurement I know lol. Just look it up online.

Answer 10

300000000 MPH

Answer 11

670,616,629.384 mph