A thin gollow equiconvex lens, silvered at the back, converges a parallel beam of light at a distance of 0.2 m in front of it. Where will it converge the same light if filled with water having `mu=(4//3)`?

Explain how a parallel beam of light on refraction from a convex lens gets converged.

A parallel beam of light after refraction through a lens, converges toward its principal focus. What kind of lens is it?

A converging beam of light incident on a lens emerges as a parallel beam. What kind of lens is it?

Two identical thin isosceles prisms of refracting angle A and refractive index mu are placed with their bases touching each other and this system can collectively act as a crude converging lens. A parallel beam of light is incident on this system as shown in Figure. Find the focal length of this so called converging lens.

Two identical thin isosceles prisms of refracting angle A and refractive index mu are placed with their bases touching each other and this system can collectively act as a crude converging lens. A parallel beam of light is incident on this system as shown in Figure. Find the focal length of this so called converging lens.

A beam of light of wavelength 590 nm is focused by a converging lens of diameter 10.0 cm at a distance of 20 cm from it. find the diameter of the disc image formed.