What is the speed of all forms of electromagnetic radiation in a vacuum

(speed of light)

Explanation:

Electromagnetic waves are oscillations of the electric and the magnetic field that occur in a plane perpendicular to the direction of travelling of the wave.

All electromagnetic waves travel in a vacuum at the same speed, whose value is:

And this value is called speed of light.

Electromagnetic waves are classified into 7 different types, depending on their wavelength/frequency. From highest to lowest frequency, we have:

Gamma rays

X-rays

Ultraviolet  radiation

Visible light

Infrared radiation

Microwaves

Radio waves

frequency or wavelenth of em radiation in a vacuum