Electromagnetic Waves · Physics · COMEDK

The ratio of amplitude of magnetic field to the amplitude of electric field of an electromagnetic wave propagating in vacuum is

A plane electromagnetic wave of frequency $$20 \mathrm{~MHz}$$ travels through a space along $$x$$-direction. If the electric field vector at a certai...

What feature of the infrared waves make it useful for the haze photography?

Speed of electromagnetic wave in a medium having relative permittivity $$\varepsilon_r$$ and relative permeability $$\mu_r$$ is (speed of light in air...

A 30 mW laser beam has a cross-sectional area of 15 mm2. The magnitude of the maximum electric field in this electromagnetic wave is given by [Permuit...

The correct arrangement in increasing order of wavelength of X-rays, UV rays, microwave is

Which of the following waves are used to treatment of muscles ache?

Which of the following has/have zero average value in a plane electromagnetic wave?