A concave lens of glass

PHYSICS · Single correct · AP · Physics 2: Algebra-based · Geometric Optics · Geometric Optics

Problem

A concave lens of glass, refractive index 1.5 has both surfaces of same radius of curvature

R

. On immersion in a medium of refractive index 1.75, it will behave as a (1) convergent lens of focal length

3.5 R

(2) convergent lens of focal length

3.0 R

(3) divergent lens of focal length

3.5 R

(4) divergent lens of focal length

3.0 R