JAMB - Physics (1992 - No. 25)
The speed of light in air is 3 x 10\(^8\)ms\(^{-1}\). What is the speed in glass with a refractive index of 1.50?
1.5 x 108ms-1
3.0 x 108ms-1
2.0 x 108ms-1
6.0 x 108ms-1
설명
n = \(\frac{\text{c}}{\text{v}}\)
1.5 = \(\frac{3 \times 10^8}{v}\)
v = 2.0 x 108ms-1