Question

There are two plane mirror with reflecting suface faciing each other.The mirrors are moving with speed v away form each other .A point object is placed between the mirrors.The velocity of the n-th image will be
A. nv
B. 2nv
C. 3nv
D. 4nv

Answer 1

Correct Answer - B

For first Reflection `vecV_(I//M) = -vecV_("O"//M)`
`vecV_(I//O) = vecV_(I//M) -vecV_("O"//M) rArrvecV_(I//O) = vecV_(I//M)+vecV_(M//O) implies v_(I//O)=2v`
For `n^(th)`reflection velocity=`2nv`