A concave mirror has the form of a hemisphere with a radius of `R=60cm` A thin layer of an unknown
Channel: Doubtnut
Date: 2020-08-23

A concave mirror has the form of a hemisphere with a radius of `R=60cm` A thin layer of an unknown transparent liquid is poured into the mirror ,The mirror-liquids system forms one real Image and another real image is formed by mirror alone ,with the souces ina  certain position .One of them coincides with the source and the other is at  distance of `l=30cm`from source.find the possible value(s) refractive index `mu`of the liquid.