Physics > 2005 > 28
WASSCE
Radio waves travel in air at 3.0 × 108 ms-1. If the waves enter water of refractive index 4/3, calculate the speed of radio waves in water.
A.
4.33 × 108 ms-1
B.
4.00 × 108 ms-1
C.
2.25 × 108 ms-1
D.
1.33 × 108 ms-1
Answer: C
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