Fichas
Cooking and communicating using waves(P1)
Fichas del conjunto (10)
- 1What radiation does not penetrate food very easilyInfrared radiation
- 2What radiation penetrates up to 1cm into food?Microwaves
- 3What can microwaves penetrateGlass or plastic
- 4What are microwaves reflected byShiny metal surfaces:
-special glass in a microwave oven door reflects microwaves
-they can cause body tissue to burn - 5What is microwave radiation used for?Communicating over long distances
- 6Where does the transmitter and receiver have to be placed to get a signal?In line of sight (aerials normally on top of high buildings)
- 7What communication are satellites used forMicrowave communication
- 8How do satellite signals workThe signal from earth is received, amplified and re-transmitted back to earth
- 9Why are satellites in line of sightBecause there are no obstructions in space( large aerials can handle thousands of phone calls and television channels at once)
- 10What are the concerns about the use of mobile phones and phone mastsWhere they're situated (scientists publish results of their studies to allow others to check their findings)
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- GCSE (P1) Physics Fichas sobre Cooking and communicating using waves(P1), creado por Morgan Cheney el 04/05/2017.
- Creado por
- Morgan Cheney
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