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Question 1
Which electromagnetic waves are used for satellite communication?
Question 2
The light from a 100 W bulb uniformly spreads out in all directions. Find the intensity I of the electromagnetic waves at a distance of 5 m from the bulb.
Question 3
The magnetic field of an electromagnetic wave in a substance is given by 
. Find the refractive index of the substance.
. Find the refractive index of the substance.
Question 4
A radio can tune in to any station in the 50 m to 25 m wavelength band. What is the corresponding maximum and minimum frequency band respectively?
Question 5
Bragg’s law for x-ray is
Question 6
Electromagnetic radiation consists of photon which have the greatest energy is:
Question 7
The phenomenon of polarisation of electromagnetic waves proves that electromagnetic waves are _________.
Question 8
Choose the false statement with respect to the properties of electromagnetic waves?
Question 9
Which of the following is not an example of electromagnetic waves?
Question 10
Infra-red rays are
(A) Longitudinal waves
(B) Transverse waves
(C) Mechanical waves
(D) Electromagnetic waves
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