Surface waves travelling in deep water at 15ms -1 are incident at a shallow water...
PHYSICS
WAEC 2001
Surface waves travelling in deep water at 15ms-1 are incident at a shallow water boundary. If the angles of incidence and refraction are 45o and 30o respectively. Calculate the speed of the waves in shallow water
- A. 8.1ms-1
- B. 10.0ms-1
- C. 10.6ms-1
- D. 22.5ms-1
Correct Answer: C. 10.6ms-1
Explanation
n = \(\frac{\sin 45}{\sin 30} = 1.4142\)
n = \(\frac{15m/s}{x}\)
x = \(\frac{15}{1.4142}\) = 10.6m/s
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