Electromgnetic waves travel in a medium with a speed of `2 xx 10^8 m s^(-1)`.The relative permeability of the medium is 1.Find the relative permittiity.

Calculate the de-Broglie wavelength for electron moving with speed of 6 xx 10^5 m s^(-1) .

The velocity of electromagnetic waves in free space is 3 xx 10^8 m s^(-1) .The frequency of a radio wave of wave length 150 m is

Experimental observations have shown that X-rays travel in vacuum with a speed of 3 xx 10^8 m s^(-1) . What conclusion can be drawn about the nature of X-rays from this observation?

An electromagnetic wave is travelling in a medium with a velocity vecv=v hati . The electric field oscillations, of this electromagnetic wave, all along the Y-axis. Identify the direction in which the magnetic field oscillations are taking place of the e.m. wave.

Sound waves of wavelength lambda travelling in a medium with a speed of v m/s enter into another medium where its speed is 2v m/s.Wavelength of sound waves in the second medium is:

In an electromagnetic wave,the amplitude of oscillating magnetic field is 2 xx 10^(-7) T. What is the amplitude of oscillating electric field in the wave?Given c=3 xx 10^8 m s^(-1) .