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Light -- how light particles can penetrate through glass?

  1. Feb 11, 2015 #1
    how light particles can penetrate through glass?
  2. jcsd
  3. Feb 11, 2015 #2


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    Staff: Mentor

    No it is not. Lead glass has a higher density than aluminium, but the former is transparent while the latter is not.

    To be not transparent, there has to be something that can absorb (or scatter) light - usually electrons that can reach a higher energy level. The electrons in transparent glasses are bound to their atoms/molecules and do not have accessible energy levels they could go to from the absorption of light.
  4. Feb 11, 2015 #3
    thanks for the explanation.but whether it means electrons are absorbed? then whether light loses energy?
  5. Feb 11, 2015 #3


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    Staff: Mentor

    If the atoms making up the material have the right characteristics, then the light will be absorbed by the electrons in the material.
  6. Feb 14, 2015 #4
    right characteristics??? anyway, thanks! got some idea now. :)
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