3c) The Electromagnetic Spectrum

Radio Waves	Microwaves	Infrared	Visible Light	Ultra-Violet	X-Rays	Gamma Rays
1m-104 m	10-2 m (1 cm)	10-5 m (0.01 mm)	10-7 m	10-8 m	10-10 m	10-12 m
Increasing frequency and Decreasing wavelength ----------->
TV and FM radio broadcasting Communications	Satellite communication Transmitter Cooker	Electrical heaters Night vision equipment	Optical fibres Photography Colours; ROY GBIV	Fluorescent lights/lamps	Internal structure of objects/materials	Sterilising food and medical equipment
harmless	heat body tissues internally	cause skin burns	none	damage surface cells blindness	none	cell mutation tissue damage cancer