How thick does a material have to be to start to become opaq

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-que to light?Someone said a atom is transparent to light to me.
but as a material get more thicker, either in single atoms, or a micron, electrons start to absorb light, and there is no more transparency
How thick does a material have to be before there is no more transparency.
Like the material acts as a wall to light.
Now solid state physics can be VERY DIFFERENT than atomic physics.
When atoms are joined together to form a solid, their behavior can be very different than when they are isolated. There are no more "discrete energy states" at the low-lying range, because these have been replaced by energy BANDS!.
If I take carbon atoms, and arrange it in one way, I get graphite.
But I change the arrangement in another way, I get diamond!
Two completely different types of material, and with different optical properties.
Yet, each one of them is made of carbon.
Thank you for your help, anything helps,even a few words.
 
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Gold need only be a couple of atoms thick to be opaque.
Water needs to be many tens of metres thick to be opaque.
 
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DaveC426913 said:
Gold need only be a couple of atoms thick to be opaque.
Water needs to be many tens of metres thick to be opaque.
Thank you
 
DaveC426913 said:
Gold need only be a couple of atoms thick to be opaque.
Water needs to be many tens of metres thick to be opaque.
Great thank you.
 
Nicholas Lee said:
-que to light?Someone said a atom is transparent to light to me.
but as a material get more thicker, either in single atoms, or a micron, electrons start to absorb light, and there is no more transparency
How thick does a material have to be before there is no more transparency.
Like the material acts as a wall to light.
Now solid state physics can be VERY DIFFERENT than atomic physics.
When atoms are joined together to form a solid, their behavior can be very different than when they are isolated. There are no more "discrete energy states" at the low-lying range, because these have been replaced by energy BANDS!.
If I take carbon atoms, and arrange it in one way, I get graphite.
But I change the arrangement in another way, I get diamond!
Two completely different types of material, and with different optical properties.
Yet, each one of them is made of carbon.
Thank you for your help, anything helps,even a few words.

Are you aware that you plagiarized one of my posts?

If you are CITING someone, either use the QUOTE function, or quote what you are copying in " ". Otherwise, this looks as if this was ALL written by you!

And why are you starting a new thread, rather than asking this as a follow-up to the thread that had this passage that you copied? You have started numerous threads on almost the SAME topic.

Zz.
 
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