THE ELECTROMAGNETIC SPECTRUM

	RADIO	I.R	LIGHT	U.V	X-RAYS	GAMMA
USES	1)RADIO, 2)T.V, 3)REMOTE CONTROL CARS, 4)AMATEUR RADIO 5) MOBILE PHONES, 6)MICROWAVES,	1) TV REMOTE CONTROLS, 2)HEAT SENSING GOGGLES	1)CAMERAS, 2)PHOTOSYTHESIS, 3)FILM, 4)SEEING	1) SUN TAN, 2) LIGHTING EFFECTS	1)VIEWING BROKEN BONES, 2)AIRPORT SECURITY	1) NUCLEAR ENERGY, 2) CHEMOTHEROPY, 3) IRRADIATING FOOD, 4) STERILISING MEDICAL EQUIPMENT, 5) MEASURE THE THICKNESS OF METALS
SOURCE	RADIO TRANSMITTERS	ANYTHING HOT	SUN, LIGHT BULB, FIRE, CHEMICALS	SUN, U.V LAMPS	STARS, X-RAY TUBES	RADIO ACTIVE SOURCES
DETECTOR	RADIO RECIEVER	SKIN I.R CAMERAS	EYES, PHOTOGRAPHIC FILM	SKIN,	PHOTOGRAPHIC FILM	GEIGER COUNTER
NOTES	The Largest part of the spectrum. Can be split down further (see below). Longest wavelength waves travel the furthest. Mobile phone frequencies close to microwaves	Some animals see in IR. Fire service developed IR goggles to check for people in burning buildings. Police and Army also use them.	Only part of the spectrum that we (as humans) can detect properly. Smallest part of the spectrum. Has it’s own spectrum (of colour)- see below	UV needed for a sun tan. However, too much can cause skin cancer. UV light can also damage eyes.	Wavelength of x-rays, so small they can squeeze through particles in skin and flesh but not bone. Over exposure can lead to cancer.	Most dangerous of the waves are so small that they can pass through cells causing cancer. However, high energy gamma can kill cells (chemotherapy) and even bacteria
WAVE -LENGTH	100,000m to 1mm	0.001m to 0.000001m	0.000001m	10^-7 to 10^-8	10^-8 to 10^-11	10^-11 to 10^-15

RADIO SPECRUM LIGHT SPECTRUM

Infra-red image Ultra Violet image