The speed of light in air is 3 x 10 8 ms -1 . What
PHYSICS
JAMB 1992
The speed of light in air is 3 x 108ms-1. What is the speed in glass with a refractive index of 1.50?
- A. 1.5 x 108ms-1
- B. 3.0 x 108ms-1
- C. 2.0 x 108ms-1
- D. 6.0 x 108ms-1
Correct Answer: C. 2.0 x 108ms-1
Explanation
1.5 = \(\frac{3 \times 10^8}{v}\)
v = 2.0 x 108ms-1
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