Question

What is lateral shift? Establish relation between focal length and radius of curvature of a mirror.

Answer 1

When ray of light incident on the parallel side of the glass slab the emergent ray shifts laterally to some distance that distance is called the lateral shift.

The factor on which lateral shift is depend are,

1) Thickness of the refracting surface

2) Refractive index of the material

The relation between focal length and radius of curvature is ,

$f=\frac{R}{2}$