physics :EM spectrum

electromagnetic spectrum order

gamma rays, x-rays, ultra-violet rays, visible light, infra-red, microwaves, radio waves

shortets wavelength

Gamma

longest wavelength

radio

greatest frequency

gamma

lowest frequency

radio

gamma ray uses

sterilizing food and medical equipment

x ray uses

observing internal structure of objects, medical

ultraviolet uses

fluorescent lamps, banknote and passport security

visiblie light uses

vision, photos, optical fibres

infrared uses

heaters and night vision

microwave uses

cooking satellite transmissions

radio waves uses

broadcasting and communications

gamma danger

cell damage, cancer, mutation

x-ray danger

cell damage, mutation cancer

ultraviolet danger

damage to surface cells, blindness

visible light danger

eye damage from bright light

infrared danger

skin burns

microwaves danger

internal heating of body tissues