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Old Aug 13th 2014, 10:07 PM   #1
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Interaction of matter and radiation

To whom is able to answer this:
I think that when radiant energy get in contact with matter three basic phenomena take place:
1.- Transmission
2.- Reflection
3.-Absorption and emission
I think this three basic phenomena enclose all phenomena that can occur after the interaction
I wait for your answer
With all the best
Marco Uscanga
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Old Aug 14th 2014, 05:46 AM   #2
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I'm not sure what your question is, but it is correct that the energy of the incident radiation on an object is equal to the sum of the energy that is (a) absorbed by the object, (b) transmitted through the object,and (c) reflected by the object. You have "absorption and emission," I suppose because you assume they must be equal, which is true if the object is in thermal equilibrium. But in effect you are double counting absorption.
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Old Aug 14th 2014, 06:03 AM   #3
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I am thinking that there might be an extra division in the Transmission category.

a) the matter and the radiation totally ignore each other.
b) the matter and radiation mutually interact, but the radiation carries on after (e.g. refraction).
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Old Aug 14th 2014, 08:20 AM   #4
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Originally Posted by MBW View Post
I am thinking that there might be an extra division in the Transmission category.

a) the matter and the radiation totally ignore each other.
b) the matter and radiation mutually interact, but the radiation carries on after (e.g. refraction).
Yes, these are both counted in the "transmission" category.
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