Waves

V = f x λ

V- Wavespeed (m/s)

f- Frequency (Hz)

λ- Wavelength (m)

DISPERSION IS: THE SPLITTING UP OF WHITE LIGHT INTO ITS SEVEN SEPARATE COLOURS

Long Wavelength -------------- Short Wavelength

Radio Waves Microwaves Infrared Visible Light UV X-Rays Gamma

Uses:

Radiowaves - Communication Microwaves - Cooking

Infrared - Thermal Imaging Visible Light - Photosynthesis

UV - Detecting Forgery X-Rays - Medical Imaging

Gamma Rays - Sterilisation 

Long Wavelength -------------- Short Wavelength

Radio Waves Microwaves Infrared Visible Light UV X-Rays Gamma

Uses:

Radiowaves - Communication Microwaves - Cooking

Infrared - Thermal Imaging Visible Light - Photosynthesis

UV - Detecting Forgery X-Rays - Medical Imaging

Gamma Rays - Sterilisation