An equiconvex lens of refractive index 3 2 and of radius of curvature 16 cm...

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An equiconvex lens of refractive index 3 2 and of radius of curvature 16 cm is placed co axially at a distance of 90 cm in front of concave mirror of radius of curvature 60 cm The surrounding medium is air A point object O is placed on the common axis of the lens and the mirror at a distance 90 cm left of the lens At an instant t 0 the object the lens and the mirror start moving with a speed 2 cm s 3 cm s and 8 cm s respectively in the direction shown in the figure If the time in sec after which the object and its final image coincide for the second time in sec is sec then final value of N 58 N 2 cm s 3 cm s 8 cm s Correct answer 05

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