Question
A point located 5cm away from a source of sinusoidal
oscillations has a displacement equal to half of the maximum amplitude at time t=T/4 (where T is the time period). The source was at its mean position at t=0. What is the wavelength of the wave?Solution
Given:
- Distance of point from source = 5 cm =Â 0.05 m
- Displacement of point at t=T/4 = half of maximum amplitude = A/2
- At t=0, the source  is at mean position  (zero displacement).
- We are asked to find the wavelength .
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