P is a point on the axis of a concave mirror. The image of P, formed by the mirror, coincides with P
Channel: Doubtnut
Date: 2020-08-16

P is a point on the axis of a concave mirror. The image of P, formed by the mirror, coincides with P. A rectangular glass slab of thickness t and refractive index `mu` is now introduced between P and the mirror. For the image of P to coincide with P again, the mirror must be moved