An object is moving with constant speed \( v_{0} \), towards a concave mirror along its principa...

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An object is moving with constant speed \( v_{0} \), towards a concave mirror along its principal axis, from a distance \( 4 f_{0} \) as shown, where \( f_{0} \) is the focal length of mirror. The correct graph of speed of image \( \left(v_{\mathrm{i}}\right) \) with time \( (t) \) is
(a)
(b)
(c)
(d)
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