CAPE Physics Unit 1 · 2012 · Paper 1 · Question Q26
As light travelling in air enters a medium its speed changes to 2.4 \times 10^8\text{ m s}^{-1}. The refractive index of the medium is
- (A)0.60
- (B)0.80
- (C)1.25
- (D)1.50
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