Assertion : Electromagnetic waves exert radiation pressure Reason : Electromagnetic waves carry energy.

Correct Answer - D Given: `E = 13.2 keV` `lambda("in" Å) = (hc)/(E("in"eV)) = (12400)/(13.2 xx 10^(3)) = 0.939 Å ~~ 1Å` X-rays cover wavelengths ranging from about `10^(-8)m (10 nm)`...

Correct Answer - A Transverse waves are those waves in which the particles of the medium oscillate perpendicular to the direction of wave propagation.

Correct Answer - C The electromagnetic wave contains sinusoidally time varying electric and magnetic field which act perpendicualr to each other as well at right angle to the direction of propagation...

Correct Answer - B `v=(1)/(sqrt(muepsilon))=(c)/(sqrt(mu_(r)epsilon_(r))`

Correct Answer - C Electromagnetic waves interact with matter via their electric and magnetic field which set in oscillation of charges present in all matter. The detailed interaction and so the...

Correct Answer - B Consider a plane perpendicular to the direction of propagation of the electromagnetic wave. If electric charges are present in this plane, they will be set and sustained...

Correct Answer - A Electromagnetic waves can carry energy from one place to another. This makes radio and TV signal broadcasting possible. Also light carries energy from the sun to the...

Correct Answer - C Radio waves are electromagnetic waves having low energy. A low energy wave has a low frequency and consequently a large wavelength. Diffraction of waves takes place when...

Correct Answer - D The optical waves used in optical fibre communication are better carrier of signals than microwaves. The speed of microwave and optical wave is the same in vacuum.

Correct Answer - A The basic difference between various types of electromagnetic waves lies in their wavelengths or frequencies since all of them travel through vacuum with the same speed. Consequently,...