allerySpeed of light in glass (n = 1.5) is approximately:
A1 × 10⁸ m/s
B2 × 10⁸ m/s
C3 × 10⁸ m/s
D4.5 × 10⁸ m/s
Answer & Solution
Correct answer: B. 2 × 10⁸ m/s
We have v = c/n.
That is v = 3 × 10⁸ / 1.5.
So v = 2 × 10⁸ m/s.
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