# Electromagnetic Waves Travel Through Space At A Speed Of?

All electromagnetic waves travel across space at the speed of light, which is about 300 million meters per second (3.0 x 108 m/s).

## Why do electromagnetic waves travel at the same speed?

2 Answers. Electromagnetic waves include visible light, radio waves, X-rays, and so on. The reason for qualifying ‘in vacuum’ is because EM waves of different frequencies often propagate at different speeds through material. The speed of a wave c, its wavelength λ and frequency f are all related according to c=λf.

## What is the speed of electromagnetic waves in space?

An electromagnetic wave transports its energy through a vacuum at a speed of 3.00 x 108 m/s (a speed value commonly represented by the symbol c). The propagation of an electromagnetic wave through a material medium occurs at a net speed which is less than 3.00 x 108 m/s.

## How do electromagnetic waves travel through empty space?

Electromagnetic waves are waves that can travel through matter or through empty space. However, when light travels in matter, it interacts with the atoms and molecules in the material and slows down. As a result, light travels fastest in empty space, and travels slowest in solids.

## 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).