AIPMT | 2014Wave OpticsHard

Question

Light with an energy flux of 25 × 104 Wm-2 falls ona perfectly reflecting surface at normal incidence. If the surface area is 15 cm2, the average force exerted on the surface is

Options

A.1.25 × 10-6N
B.2.50 × 10-6N
C.1.20 × 10-6 N
D.3.0 × 10-6 N

Solution

Fav = N
250 × 10-8 N = 2.5 × 10-6 N

Create a free account to view solution

View Solution Free
Topic: Wave Optics·Practice all Wave Optics questions

More Wave Optics Questions

In refraction, light wave are bent on passing from one medium to the second medium,because, in the second medium :...The coherent source of light produces constructive interference when phase difference betwen them is :...In the Young′s double slit experiment, for which colour the fringe width is least ?...In Fraunhoffer diffraction the centre of diffraction image is :...In fresnel′s biprism experiment a mica sheet of refractive index 1.5 and thickness 6 × 10-6 m is placed in th...