Electromagnetic...

According to Maxwell’s equations

Plane electromagnetic wave travels in vacuum along z-direction. If the frequency of the wave is 30 MHz, its wavelength is

Electromagnetic waves propagate

State the part of the electromagnetic spectrum to which 1057 MHz (frequency of radiation arising from two close energy levels in hydrogen; known as Lamb shift)..Belongs

Long distance radio broadcasts use short-wave bands because

Which of these mechanisms can be used to produce electromagnetic waves?

The amplitude of the magnetic field part of a harmonic electromagnetic wave in vacuum is B₀= 510 nT. Amplitude of the electric field part of the wave is

It is necessary to use satellites for long distance TV transmission because

The intensity of a plane electromagnetic wave is proportional to

According to Maxwell’s equations

The direction of propagation of an electromagnetic plane wave is

Infrared waves are produced by

Use the formula λ_m T = 0.29 cmK to obtain the characteristic temperature range for λ_m=5×10^-7m

Optical and radio telescopes are built on the ground, but X-ray Astronomy is possible only from satellites orbiting the earth because

Plane electromagnetic waves are

Without the concept of displacement current it is not possible to correctly apply Ampere’s law on a path parallel to the plates of parallel plate capacitor C in

Visible range of electromagnetic spectrum is

State the part of the electromagnetic spectrum to which 21 cm (wavelength emitted by atomic hydrogen in interstellar space).belongs

Velocity of plane electromagnetic waves in vacuum equals

Tanning of the skin in sunlight is due to

A charged particle oscillates about its mean equilibrium position with a frequency of 10⁹ Hz. Frequency of the electromagnetic waves produced by the oscillator is

If the earth did not have an atmosphere, would its average surface temperature be higher or lower than what it is now?

Do EM waves need a medium to travel through?

Comparing X-rays and Gamma rays

7.5 MHz to 12 MHz band corresponds to wavelength band of

The speed of plane electromagnetic waves is maximum in

When white light is split into its component colors by a prism

Some scientists have predicted that a global nuclear war on the earth would be followed by a severe ‘nuclear winter’ with a devastating effect on life on earth. What might be the basis of this prediction?