Why can't light go thru solids?

In summary: The photon waits until it has enough energy to break the electron's energy barrier. Then it is emitted.
  • #1
quantumh2o
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0
With the huge distances between atoms, relative to the size of the atoms, why aren’t photon packets able to travel through most “solids”? Why are those same photon packets able to travel through many liquids?
 
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  • #2
I found your question interesting quantumh20.
Sorry I don't have an answer for you just another question because of your question.
Are transparent liquids non-transparent to a different part of the spectrum than solids?
 
  • #3
quantumh2o said:
With the huge distances between atoms, relative to the size of the atoms, why aren’t photon packets able to travel through most “solids”? Why are those same photon packets able to travel through many liquids?

You might want to start by reading one of the FAQ entry in this forum (General Physics) on photon transport in matter. It is a "start", since there are many other factors involved in optical conductivity in solids.

Zz.
 
  • #4
"On the other hand, if a photon has an energy beyond the phonon spectrum, then while it can still cause a disturbance of the lattice ions, the solid cannot sustain this vibration, because the phonon mode isn't available. ... So the lattice does not absorb this photon and it is re-emitted but with a very slight delay. This, naively, is the origin of the apparent slowdown of the light speed in the material. The emitted photon may encounter other lattice ions as it makes its way through the material and this accumulate the delay."

Where does the photon go while it is waiting to be 're-emitted'?
 
  • #5
The energy goes into vibrations of the solid (phonons) while it's "waiting".
 
  • #6
Thanks.
Sounds similar to the action with electrons.
Is it? Does it mean, in a similar vein, that the photon disappears and a new photon is emitted with each interaction; as it does when an electron absorbs the photons energy and gains that energy? Or is that not right? I'm still not sure where your answer is on this even with your explanation I apologise.
 

Related to Why can't light go thru solids?

1. Why can't light go through solids?

Light cannot pass through solids because solid materials have tightly packed particles that do not allow for the movement of light. In order for light to pass through a material, the particles must be able to vibrate and move, which is not possible in solids.

2. Can light go through all types of solids?

No, light cannot go through all types of solids. Materials such as glass, water, and air are considered transparent because their particles are loosely packed and allow for the movement of light. However, materials such as wood, metal, and stone are considered opaque because their particles are tightly packed and do not allow light to pass through.

3. Why can light pass through liquids and gases, but not solids?

Liquids and gases have particles that are more spread out compared to solids, allowing for the movement of light. In liquids, the particles are able to slide past each other, while in gases, the particles are constantly moving and have large spaces between them. This allows for light to easily pass through these materials.

4. Is there any way to make light pass through solids?

Yes, there are some materials that can be considered translucent, meaning they allow some light to pass through. These materials have particles that are more loosely packed compared to solids, but not as much as transparent materials. Examples of translucent materials include frosted glass and wax paper.

5. Why is it important for light to not go through solids?

If light were able to pass through solids, it would make it difficult for us to see and distinguish objects. Light reflects off of objects, allowing us to see them. If light were able to pass through solids, it would not reflect off of objects and we would not be able to see them clearly. This would greatly impact our ability to navigate and understand the world around us.

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