# GCSE Physics

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The flashcards below were created by user ghoran on FreezingBlue Flashcards.

1. electromagnetic waves are all ..... waves
transverse
2. all types of electromagnetic waves
travel at the same speed this is 300,000,000 m/s
3. electromagnetic radiations travel as waves and move energy from one place to another . the waves cover a continuos range of wavelenghts called the
electromagnetic spectrum
• microwaves
• infra red
• visible light
5. place infra red , visible light , microwaves and radio waves in order of their frequency , energy and wavelength with the lowest frequency and energy first and the longest wavelength first
• energy = radiowaves , microwaves , infra red rays , visible light
• frequency = radio waves , microwaves , infra red rays , visible light
• wavelength = radio waves , mircowaves , infrared rays , visible light
6. radio waves are used for
communication , mainly to trasnmitt radio (including bluetooth) and terrestrial (freeview) Tv programmes
7. what are microwaves used for
• mircowaves radiation is also used for communication and radar . It can pass through the earths atmosphere and is used to send information to and from satellite (includes sattelite Tv (sky)) , and within mobile phone netawroks .
• Microwave radiation is also strongly absorbed by water molecules and is used for heating
8. what is the hazard with mircowaves
microwaves are absrobed by water in cells , which may be damaged or killed by the heat released , so people are worried that by using mobile phones to often you could develop brain damage
9. what is infared radiation used for
infrared radiation is used in grils and toasters . it is also used for remote controls of Tv sets and voice recorders (VCR's) and in optical fribres
10. what is visible light used for
visible light is not only used for seeing (communication) and photography but can also be sent along optical fibres for example in endoscopes used by doctors to see inside pateients' bodies
11. device type of radiation use
electric cooker grill 1 2
night sight camera 3 4
satellite dish reciever 5 6
Tv ariel 7 8
• 1 = infrared
• 2 = cooking
• 3 = infared
• 4 = to see in the dark
• 5 = microwaves
• 6 = sky tv
• 8 = terrestrial Tv
12. ...... is next to visible light in the electromagnetic spectrum
infrared
13. ...... electromagnetic waves travel at the speed of light through a vacuum
all
14. ...... electromagnetic waves are transverse waves
all
15. ........ are used for Tv remote controls
infrared
16. ...... are used to send information to satellites
microwaves
17. ....... are used to send information within mobile pjone networks
microwaves
18. ...... are given out by hot objects
infared
19. ............. are detected by night vision camers
infrared
20. .......... are absorbed by water molecules in food and living cells
mircowaves

### Card Set Information

 Author: ghoran ID: 150861 Filename: GCSE Physics Updated: 2012-04-29 07:08:17 Tags: use waves communication provide evidence that universe expanding Folders: Description: gjbh Show Answers:

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