Electromagnectic spectrum
- Created by: meganarnold
- Created on: 22-04-14 16:01
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- Electromagnectic Spectrum
- Radio
- Produced and detected from aerials
- Used to broadcast TV and Radio, also used for emergency services
- Microwave
- High frequency, Short wavelength
- Used to cook food and for mobile communication
- Infrared
- Herschel found infrared waves
- Infrared waves have a longer wave length than red light
- Visible
- White light makes Colours
- Red, Orange, Yellow, Green, Blue, Indigo, Violet
- Red has the longest wave length reaching Infrared and Violet has the shortest wave length reaching UV.
- Red, Orange, Yellow, Green, Blue, Indigo, Violet
- White light makes Colours
- X-Ray
- Used in hospitals, airports detect metal
- A very high voltage applied between electrodes
- Electrons are accelerated and hit a tungsten target then the elctrons collide with tungsten atoms causing them to emit X-rays
- Ionising radiation
- UV
- Found by Ritter, UV waves are shorter than violet light
- It is harm and it comes from the sun, it can cause skin cancer
- Three types: UV-A, UV-B, UV-C. UV-C is most harmful with the shortest WL. UV is ionising
- Gamma
- Kill cells, bacteria in food detect cancer and cure it. It is ionising and harmful
- Radio
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