EM spectrum

Order of EM waves

radio, micro, infrared, visible, ultraviolet, x-rays, gamma

Similarities of EM waves

Transverse, travel at speed of light, ability to travel through a vacuum

wave speed formula

wavelength x frequency

MHz to Hz

x1000000

EM waves way to remember

Raging Martians invented very unusual X-ray guns

Radio waves uses

communication

Micro waves uses

Cooking and satellite communication

Infra-red uses

Heaters and night vision equipment

Visible light uses

Optical fibres and photography

Ultra violet uses

Fluorescent lamps

X-rays uses

Medicine

Gamma rays uses

Sterilising food and medical equipment

Dangers of radio waves

none

Dangers of Microwaves

Internal heating of body tissue

Dangers of Infrared

Skin burns

Dangers of visible light

damage to the retina

Dangers of Ultraviolet

Damage surface cells and causes blindness

Dangers of xrays

mutation leading to skin cancer

Dangers of gamma rays

Cell mutation and cancer