Black Body

(Wien's law: )

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Savannah Mance 4G
Posts: 107
Joined: Fri Aug 30, 2019 12:17 am

Black Body

Postby Savannah Mance 4G » Mon Oct 07, 2019 9:07 pm

I know that a black body is an idealized object that absorbs all incoming light. But does it also hypothetically reflect light as well? And if so does it reflect light of all wavelengths?

Mashkinadze_1D
Posts: 87
Joined: Sat Aug 24, 2019 12:15 am

Re: Black Body

Postby Mashkinadze_1D » Mon Oct 07, 2019 9:27 pm

To the extent of my knowledge, black bodies do not reflect light, only absorb. This being said, Professor Lavelle mentioned that this is much more so a physics concept and we should not worry heavily on memorizing or understanding it.

Diana_Diep2I
Posts: 130
Joined: Sat Aug 17, 2019 12:17 am

Re: Black Body

Postby Diana_Diep2I » Tue Oct 08, 2019 10:19 am

A black body only absorbs. I think it's like being in a dark room, where you can't see anything because it is all black and nothing is reflected. A white body reflects

Hannah Romano 4D
Posts: 55
Joined: Sat Aug 24, 2019 12:18 am

Re: Black Body

Postby Hannah Romano 4D » Tue Oct 08, 2019 11:02 am

Although light and heat energy are not the same, they often go hand in hand. Does this mean that if a black body object absorbs all light, will it also become very hot? Or are these two forms of energy unrelated in this example?

Yiyang Jen Wang 4G
Posts: 76
Joined: Wed Nov 21, 2018 12:18 am

Re: Black Body

Postby Yiyang Jen Wang 4G » Tue Oct 08, 2019 11:23 am

I think professor mentioned in class that the perfect black body that can absorb all frequencies of light does not currently exist. Cuz if we can still see it, it must has reflected some sort of frequencies which are able to be detected by our eyes, or it will just be invisible. Plz correct me if I am wrong.

Astrid Lunde 1I
Posts: 103
Joined: Sat Sep 07, 2019 12:16 am

Re: Black Body

Postby Astrid Lunde 1I » Wed Oct 09, 2019 12:15 pm

Yiyang Jen Wang 4I wrote:I think professor mentioned in class that the perfect black body that can absorb all frequencies of light does not currently exist. Cuz if we can still see it, it must has reflected some sort of frequencies which are able to be detected by our eyes, or it will just be invisible. Plz correct me if I am wrong.

That would make scene because if we can still see it it has to be reflecting some form of light frequency.


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