alleryAt an interface sin i/sin r=1.5; speed in medium 1 is 2.4×10^8 m/s. Speed in 2?
A0.9×10^8 m/s
B2.4×10^8 m/s
C3.6×10^8 m/s
D1.6×10^8 m/s
Answer & Solution
Correct answer: D. 1.6×10^8 m/s
The relative index is 1.5 and equals the speed ratio v1/v2, giving v2=2.4×10^8/1.5 = 1.6×10^8 m/s.
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