Electromagnetic Waves Questions

The condition under which a microwave oven heats up a food item containing water molecules most efficiently is :-

A radiation of energy ′E′ falls normally on a perfectly reflecting surface. The momentum transferred to the surface is (C = Velocity of light) :-

An EM wave from air enters a medium. The electric fields are E→1=E01x^cos2πνzc-t in air and E→1=E01x^cosk2z-ct in medium, where the wave number k and frequency v refer to their values in a...

Out of the following options which one can be used to produce a propagating electromagnetic wave?

During the propagation of electromagnetic waves in a medium

Given below are two statements: one is labelled as Assertion (A) : and the other is labelled as Reason (R).Assertion (A) : The electromagnetic wave exerts pressure on the surface on which they are all...

n an electromagnetic wave in free space the root mean square value of the electric field is Erms = 6V/m. The peak value of the magnetic field is :-

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...

A pulse of light of duration 100 ns is absorbed completely by a small object initially at rest. Power of the pulse is 30 mW and the speed of light is 3 × 108 ms-1. The final momentum of the objec...

Electromagnetic waves is invented by :-

An em wave is propagating in a medium with a velocity V→=Vi^ . The instantaneous oscillating electric field of this em wave is along +y axis. Then the direction of oscillating magnetic field of ...

In an electromagnetic wave, the direction of the magnetic field induction is -

Which the following is the order of infrared wavelength ?

Which of the following statements is false:

Which of the prism is used to see infra-red spectrum of light -

Speed of light in vacuum is :-

The electric field of an electromagnetic wave is represented by, Ex = 36 sin (1.20 × 107 z - 3.6 × 1015 t) Volt/m) The average intensity of the wave will be :-...

Electric field onlyIn an electromagnetic wave the average energy density is associated with :-

If ∈0 and μ0 are the electric permittivity and magnetic permeability in free space, ∈ and μ are corresponding quantities in medium, the index of refraction of the medium is :-...

The electric and the magnetic field, associated with an e.m. wave propagating along the +z axis, can be represented by :-