Electromagnetic radiation is the lightest and fastest material in the universe. It includes gamma ray, X-ray, ultraviolet radiation, visible light, infrared radiation, microwave, and radio wave, with gamma ray having the highest energy, which is caused by high frequency, and radio wave having the lowest energy and all the others in between them in order from high energy to low energy. Wave frequency doesn’t affect the speed of the various radiations; they all travel at a speed of 299,792,458 km/s.

Different Radiations:

Gamma ray has a wave frequency of 300-30 EHz and a wave length of 1-10 pm. X-ray has a wave length of 10 pm-10 nm and a frequency of 30 EHz-30 PHz. UV radiations has a wave frequency of 30-3 PHz and a wave length of 10-100 nm. Visible light has a wave frequency of 3 Phz-300 THz and a wave length of 100 nm-1µm. Infrared radiations has a wave frequency of 300 THz-300GHz and a wave length of 1 µm-1 mm. Microwave has a wave frequency of 300 GHz-300MHz and a wave length of 1 mm-1 m. Radio wave has a wave frequency of 300 MHz-30 Hz and a wave length of 1 m-1 Mm (1 million meter).