Physics - 3.08

  • Created by: Dan_23
  • Created on: 25-05-21 17:55
  1. All objects absorb and emit infrared radiation: emission is just as important as absorption 


All objects emit (give out) and absorb infrared radiation. 

It does not matter what temperature the object is: the statement above is always true. 

Hotter objects emit more radiation in a given time with a shorter wavelength than cooler objects. 

A good absorber of radiation is also a good emitter of radiation. 


  1. The temperature of an object is related to absorption and emission of radiation 


Radiation intensity is how much energy an object radiates per metre squared. 

In other words, intensity is how much energy is emitted from a certain area in a given time. 

The intensity of


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