Why is glass transparent?

[dnar]

Think you know? If google searches gave you the answer then you may be wrong.

Check this out.

http://www.sixtysymbols.com/videos/energygap.htm

[lasersbee]

Think you know? If google searches gave you the answer then you may be wrong.

Check this out.

http://www.sixtysymbols.com/videos/energygap.htm

Very interesting.... I didn't exactly know that...
Thanks for posting it...

Jerry

[Doc]

Thank you for posting.

So now I know the reason I can't make it through the day - I have too much energy

[Meatball]

So now I wonder what the arrangement of electrons has to do with reflection... when obviously very little energy is absorbed nor transmitted.

So now thinking about open air, is that the same reason why we can see through open air?

N2, Co2, and O2 have energy levels that are too high when they are in a gaseous state?

[tocket]

So now I wonder what the arrangement of electrons has to do with reflection... when obviously very little energy is absorbed nor transmitted.

So now thinking about open air, is that the same reason why we can see through open air?

N2, Co2, and O2 have energy levels that are too high when they are in a gaseous state?

N2 and CO2 have energy gaps, but O2 actually has one that is small enough to absorb visible light. If you search for images of liquid oxygen you'll see that it is in fact blue. The absorption is rather weak though and since the density of a gas is much lower than that of a solid very little light is actually absorbed by oxygen in the atmosphere. This absorption isn't even the reason the sky is blue.

[dnar]

N2 and CO2 have energy gaps, but O2 actually has one that is small enough to absorb visible light. If you search for images of liquid oxygen you'll see that it is in fact blue. The absorption is rather weak though and since the density of a gas is much lower than that of a solid very little light is actually absorbed by oxygen in the atmosphere. This absorption isn't even the reason the sky is blue.

True, rayleigh scattering is responsible for blue skies.

[Meatball]

Anyone ever hear of MIT professor Dr. Walter Lewin?

This is one of my favorite lectures of his, he has great demos and provides great insight into how these ordinary facts are derived.

Let him teach you a thing or two about rainbows, that you probably didn't know before.

http://www.youtube.com/watch?v=FJVvtOy-ukE