A ball swings back & forth in front of a concave mirror. The motion of the ball is described approximately by the equation x = f cos ω t where f is focal length of mirror and x is measured along the axis of mirror. The origin is taken as centre of curvature of the mirror. Answer the following questions.
(i) The expression for the distance from the mirror to the image of the swinging ball –
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Ans.
(i)
Sol. v = 
(ii)
Sol. π /2 ω
(iii)
Sol. m = ½
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