alleryThe refractive index of a medium is 1.5. The speed of light in this medium is:
A4.5 × 10⁸ m/s
B3.0 × 10⁸ m/s
C2.0 × 10⁸ m/s
D1.5 × 10⁸ m/s
Answer & Solution
Correct answer: C. 2.0 × 10⁸ m/s
n = c/v, so v = c/n = (3 × 10⁸)/1.5 = 2.0 × 10⁸ m/s.
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