# Do All Electromagnetic Waves Travel At The Speed Of Light?

## Why do electromagnetic waves travel at the speed of light?

All the electromagnetic waves have same velocity as light’s velocity. The resistance of the medium affects the light i.e. Em wave’s velocity. Hence,Yes! all the EM waves travel with the speed of light.

## Do all electromagnetic waves travel at the same speed in air?

All electromagnetic waves travel at the same speed through empty space. Electromagnetic waves travel more slowly through a medium, and their speed may vary from one medium to another. For example, light travels more slowly through water than it does through air (see Figure below).

## Do all waves travel the same speed?

Unlike water waves, electromagnetic waves always travel at the same speed (3 hundred million metres per second) and sound waves all travel at the same speed in a given medium (for example, approximately 340 metres per second in air). The speed of a wave is related to both its frequency and wavelength.

## What radiation travels at the speed of light?

All electromagnetic radiation travels at the speed of light (186,000 miles or 300,000,000 meters per second in a vacuum). Objects in space send out electromagnetic radiation at all wavelengths – from gamma rays to radio waves.