Physics Unit 1
- Created by: ImAngelzz
- Created on: 22-04-14 17:02
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- P1-Topic 1
- Every object contains and emits infared radiation, the redder an object appears, the more infared(heat) it is giving off.
- (Picture of electromagnetic spectrum here)
- The sun emits all types of radiation. However, the earth blocks all the radiation that could harm us.
- However it does not block infared radiation which consequently is causing temperatures to rise.
- The greenhouse effect
- gases such as water vapour and methane are released into the atmosphere and trap the radiation coming from the sun in the earth.
- This is causing global warming and causing polar ice caps to melt and causing severe damaging to environments
- Dark, matt surfaces are the best absorbers and emitters of radiation.
- Light, shiny surfaces are the best reflectors of radiation.
- Practical: You can test for the best abosrbers/emitters/ insulators by testing and comparing different materials and measuring their start and end temperatures.
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