Which one of the following electromagnetic radiations have the smallest wavelength?
The velocity of electromagnetic radiation in a medium of permittivity ε0 and permeability μ0 is given by
Two sodium lamps are used in an interference experiment. The intensity produced by both lamps individually on the screen is I. The ratio of intensity of maxima to intensity of minima on the screen is
∞:1
If a source is transmitting electromagnetic waves of frequency 8.2 × 106 Hz, then wavelength of the electromagnetic waves transmitted from the source will be
Ozone layer blocks the radiations of wave length
less than 3 × 10-7 m
equal to 3 × 10-7 m
more than 3 × 10-7 m
all of the above
The frequency of y-rays, X-rays and ultraviolet rays are a, b and c respectively. Then
The frequency of electromagnetic wave, which is best suited to observe a particle of radius 3 × 10-4 cm, is of the order of
The charging current for a capacitor at any instant is 0.25 A.The displacement current across the capacitor plates at that instant is
The amplitudes of electric and magnetic fields in an electromagnetic wave are related to each other as
E0 = B0
E0 = cB0
E0 = B0 /c
E0 = c/B
Which of the following is the longest wave?