There is a small black dot at the centre C of a solid glass sphere of refractive index `mu`. When seen from outside, the dot will appear to be located

Options

A. Away from the C for all values of `mu`
B. At C for all values of `mu`.
C. At C for `mu=1.5,` but away from C for `mu` not equal to `1.5`
D. At `C` for `2ltmult1.5`

Answer

B

Explanation

If object is placed at centre of the sphere, then all
rays starting from C fall normal on spherical
surface and pass understand.