How fast does light travel through a diamond?

Answer 1

The refractive index of diamond is about 2.42 . So the speed of light in it is

(speed of light in vacuum) divided by (2.42)

That's 123.9 thousand kilometers per second (about 77,000 miles per second).

Answer 2

The speed of light in a diamond is approximately 124,300 miles per second, which is slower than the speed of light in a vacuum (186,282 miles per second). This decrease in speed is due to the diamond's optical density and refractive index.

Answer 3

I searched on-line for the "refractive index of diamond", and was surprised

to find that the first ten sources all agreed on the number within 0.1% .

Since the refractive index of diamond is 2.417, the speed of light in it is

c/2.417 = 124,034,943 meters (77,072 miles) per second.

Answer 4

It would be far slower in diamond (which has a refractive index of just over 2.41) than glass (which varies from 1.4 to about 1.9).

Answer 5

The speed of light in diamond is 41.33 to 41.37 percent of its speed

in vacuum. That's 123,904,223 to 124,024,140 meters per second.

Answer 6

light travels slower in diamond than in glass

Answer 7

Based on my own prior knowledge and none of the information given in the question,

I conclude that the speed of light in diamond is less than it is in vacuum, air, or water.

Answer 8

Refractive index of diamond is about 2.418, according to the Wikipedia; that means that light travels slower in diamond, by that factor, than the speed of light in a vacuum.

Answer 9

It travels at approx 123,881,181 metres per second.

Answer 10

2.42