index of refraction?

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index of refraction?

The speed of light in a certain transparent material is 41.3% of the speed of light in a vacuum. What is the index of refraction of the material? (Can you identify the material?)

2006-07-30 15:25:23 · 2 answers · asked by lady_bugs_2000 2 in Science & Mathematics ➔ Physics

2 answers

Refractive index is related to how much the light is slowed down in a nonvacuum medium. If light has speed v = c/n, where n is the index of refraction and c is speed of light in a vacuum, then v/c = 1/n. 41.3% of c is .413 of c.

So .413 = 1/n by cross multiplication, we obtain n = 2.42 . The material is diamond (can be checked using any table.)

2006-07-30 15:39:15 · answer #1 · answered by mrpoolny 2 · 0⤊ 2⤋

Do your own HW

and i'm pretty sure you actually know the answers yourself

2006-07-30 22:46:08 · answer #2 · answered by Rajan 3 · 0⤊ 0⤋