A concave lens made of a material of refractive index n_(1) is kept in a medium of refractive index n_(2). A parallel beam of light is incident on the lens. Trace the path of rays of light parallel to the principal axis incident on the concave lens after refraction when: (i) n_(1)gtn_(2) (ii) n_(1)=n_(2) Give reason for each.

A concave lens made of a material of refractive index n_(1) is kept in

1.	A concave lens made of a material of refractive index n_(1) is kept in a medium of refractive index n_(2). A parallel beam of light is incident on the lens. Trace the path of rays of light parallel to the principal axis incident on the concave lens after refraction when: (i) n_(1)gtn_(2) (ii) n_(1)=n_(2) Give reason for each.
Answer» SOLUTION : `n_(1)gtn_(2)` lens behave as DIVERGING lens `n_(1)=n_(2)` no REFRACTION occurs.