Violet light is refracted the most and red light is the least refracted
2 of 16
What is the electromagnetic spectrum made up of?
Radio waves, microwaves, infrared, visible light, ultraviolet, x-rays and gamma rays
3 of 16
Which electromagnetic wave has the longest wavelength?
Radio waves
4 of 16
Which electromagnetic wave has the highest frequency?
Gamma rays
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Which electromagnetic wave has the shortest wavelength?
Gamma rays
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Which electromagnetic wave has the lowest frequency?
Radio waves
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At what speed do electromagnetic waves travel in a vacuum?
3 x 10⁸ m/s
8 of 16
And in air?
Approximately the same as in a vacuum
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What are radio waves used for?
For radio and TV signal broadcasting; these are transmitted from a transmitter to an aerial at the roof
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What are microwaves used for?
For satellite television broadcasting, to transmit mobile phone signals between masts, and to heat food
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What is infrared radiation used for?
Remote controls, fibre optic cables, detecting things in dark with security cameras
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What are x-rays used for?
To see bones (medicine), and to see what is inside baggage (security)
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Which steps are taken to be safe from harm by microwaves?
Telephone engineers need to be careful to not expose themselves to microwaves while working with masts. Microwave oven must be checked that radiation is not leaking
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Which steps are taken to be safe from harm by x-rays?
Medical staff should either stand far from x-ray machines or put it in a metal case which absorbs x-rays
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What are the dangers of ultraviolet radiation?
It causes skin tanning or sunburn if too exposed to it. Too much exposure to tanning lamps can cause burns and cell damage, leading to cancer
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Other cards in this set
Card 2
Front
Which colour is refracted the most?And less?
Back
Violet light is refracted the most and red light is the least refracted
Card 3
Front
What is the electromagnetic spectrum made up of?
Back
Card 4
Front
Which electromagnetic wave has the longest wavelength?
Back
Card 5
Front
Which electromagnetic wave has the highest frequency?
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