electromagnetic waves
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15 Terms
what are electromagnetic waves?
transverse waves that transfer energy
what speed do all EM waves travel in a vacuum?
300,000,000 m/s
what is the EM spectrum in order?
radio waves
microwaves
infrared
visible light
ultra violet
x rays
gamma rays
which EM waves have the longest wavelength?
radio waves
which EM waves have the shortest wavelength?
gamma rays
which EM waves have the highest frequency?
gamma rays
what are radio waves used for?
communication and broadcasting
what are microwaves used for?
cooking and satellite communication
what is infrared radiation used for?
heaters, thermal imaging
what is visible light used for?
vision
what is uv used for?
security marking
what are x rays used for?
medical imaging
what are gamma rays used for?
cancer treatment
which EM waves are ionising?
uv, x rays, gamma rays
why are ionising waves dangerous?
they can damage cells and DNA