N plane moirors are arranged to one another each moving with a speed v . The linear velocity of the Nth image of a point object placed in front of the first mirrora)Nv b)Nv^2 c)Nv^3 d)2Nv

I think b is the right option

Thanks

no d is the answer how is that answer pls reply

From dimensional analysis, it has to be either a or b

the object and image move in opposite directions w.r.t. the mirror, therefore if there is one mirror the relative velocity is double the velocity w.r.t. the mirror. Using the same argument repeatedly the answer should be (d).

It is important to note that the problem has not been clearly specified.