Home
Class 12
PHYSICS
Find the amplitude of the electric field...

Find the amplitude of the electric field in a parallel bean of light of intensity `2.0 W m^-2.`

Text Solution

Verified by Experts

Solution:
The intensity of a plane electromagnetic wave is
` I =(u_av)c = 1/2(varepsilon_0)(E_0^2)c`
` or, E_0 = (sqrt (2I/(varepsilon_0)c))`
` = ( sqrt(2 xx (2.0 W (m^-1))/(8.85 xx (10^-12)(C^1)(N^-1)(m^-2)) xx (3 xx (10^8) m (s^-1))))`
` = 38.8 N (C^-1)`.
Promotional Banner

Topper's Solved these Questions

  • ELECTROMAGNETIC WAVES

    HC VERMA|Exercise Question for short answers|7 Videos

  • ELECTROMAGNETIC WAVES

    HC VERMA|Exercise objective 1|9 Videos

  • ELECTROMAGNETIC WAVES

    HC VERMA|Exercise Exercise|9 Videos

  • ELECTROMAGNETIC INDUCTION

    HC VERMA|Exercise EXERCISE|98 Videos

  • GAUSS LAW

    HC VERMA|Exercise Exercises|24 Videos

Similar Questions

Explore conceptually related problems

Find the magnitude of the electric field at a point 4 cm away from a line charge of density 2 xx 10^(-6) C m^(-1) .

The intensity of electric field at a point is

The unit of electric field intensity is _______

The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B_0 = 510 nT , the amplitude of the electric field part of the wave is …..

A sphere of radius 1.00 cm is placed in the path of a parallel beam of light of large aperture. The intensity of the light is 0.50 W cm^-2 . If the sphere completely absorbs the radiation falling on it, find the force exerted by the light beam on the sphere.