An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60cm.
Find
The velocity of the wave
Name medium in which it is travelling.

Question

An electromagnetic wave has a frequency of 500 MHz and a wavelength of 60cm.
Find
The velocity of the wave
Name medium in which it is travelling.

perl · Answer

speed of electromagnetic wave = (wavelength) * frequency 

All emf waves travel at the speed of light 3.00 x 10^8 m/s in a vacuum (no collision with molecules).

perl · Answer

Mega stands for 10^6 of some unit. 

speed of emf wave = (wavelength) * frequency = 60 *10^-2 m * 500 * 10^6 s^-1 
= 300,000,000 m/s 
so the medium must be a vacuum

perl · Answer

ie, there is no medium.

perl · Answer

the refractive index is exactly 1