Seven forms of electromagnetic radiation

Basing upon their wavelength ,speed of light and some other factors electromagnetic radiation can be divided into 7 forms

they are:-

radio wave 30cm>

microwave 1nm-30cm

infrared 700nm-1nm

visible light 400nm-700nm the only wave that can be seen by human eyes

ultraviolet 60nm-400nm

x rays 0.001nm-60nm

gamma rays >0.1nm

2 more are heat radiation and long waves