Flashcards
Waves/Wavelength
Cards in this deck (17)
- 1what does hertz mean?frequency
- 2what is the speed of light?300,0000,000 billion m/s
- 3talk about infared? usage, sources and dangersusage: remote controls, heating, cooking, communications and thermal imaging
sources: hot objects
dangers: burns and burning - 4a higher frequency has....?shorter wavelength
- 5talk about microwaves? usages, dangers and sourcesusages: communications, radars, microwave ovens.
sources: alternating current in aerial magnetron
dangers: the only known one is burns - 6name the EM spectrum in order.radio
.microwave
.infared
.visible
.UV
.x-ray
.gamma ray - 7what does a wave transfer?energy
- 8what is the Doppler effect?when sounds come near you it has a higher pitch. when its moving away the pitch is lower
- 9which waves have the least amount of energy?radiowaves
- 10what's the equation for speed?speed= frequency x wavelength
- 11talk about x-rays? usages, dangers and sourcesusages: medical imaging, security (imaging inside of objects)
sources: x-ray tube
dangers: skin cancer and mutations in the DNA - 12talk about ultrasoundultrasound is used for pre-natal scanning and industrial cleaning, detecting flaws.
jewellers and watch repairers use ultra sounds to clean things by vibrating them. - 13talk about visible light? usages, dangers and sources.usages: optical fibre communications, imaging and photography
- 14talk about UV? sources, dangers and usuagesusages: tanning beds (more energy than normal light) security marking, attracting insects.
sources: sparks, arc welding and electric discharge - 15talk about gamma rays? sources, usages and dangersusages: sterilizing medical instruments and some foods, killing cancerous cells
sources: radioactive decay
dangers: large dozes can kill. lower doses can cause cancer - 16talk about radio waves? usages, sources and dangers.usages: communications, TV and radio broadcasting
dangers: non known - 17a low frequency has.....?longer wavelength
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- Flashcards on Waves/Wavelength, created by alicemae121 on 23/05/2015.
- Created by
- alicemae121 · May 2015
- Updated
- Apr 6, 2018
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