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**spapsinee** · 07-22-2009, 09:08 PM

IIRC all bodies with a temperature of above 0K emit visible light to some degree.

or is it just black bodies?

2nd EDIT: **** you for that glowing personality ****.

This visible light differs from the infrared radiation - an invisible form of light - that comes from body heat

**FredderiK** · 07-22-2009, 11:34 PM

1000 times less power than the resolution of the human eye would be pretty small. I wouldn't be surprised if the visible band of the blackbody radiation from a human is comparable.

**HonjUopu** · 07-22-2009, 11:38 PM

Assuming an emissivity of 1 (gonna be less than that), the visible power density would be on the order of ~0.1 W/m^2. Your eyes should be able to see 100 W/m^2.

**Salliter** · 07-22-2009, 11:54 PM

I know I know, but isn't a small part of the spectra ( on part with what was posted ) Vis?

Spectroscopy and ****... I loved you all once....

EDIT: fricking beaten by Ramo.

Thanks for explaining blackbody radiation to me!

However, you should be experienced enough by now to read between the lines of bad science journalism. The journalist is trying to get across that this isn't simple blackbody ****, and he mentions fluorescence in the skin later on.

**DghtRdc** · 07-23-2009, 12:17 AM

Hot water (sometimes) freezes faster than cold water.

07-22-2009, 09:08 PM	#1
spapsinee Join Date Oct 2005 Posts 501 Senior Member	A weird science thread. IIRC all bodies with a temperature of above 0K emit visible light to some degree. or is it just black bodies? 2nd EDIT: ** you for that glowing personality **. This visible light differs from the infrared radiation - an invisible form of light - that comes from body heat Share Share this post on Digg Del.icio.us Technorati Twitter
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07-22-2009, 11:34 PM	#2
FredderiK Join Date Oct 2005 Posts 375 Senior Member	1000 times less power than the resolution of the human eye would be pretty small. I wouldn't be surprised if the visible band of the blackbody radiation from a human is comparable. Share Share this post on Digg Del.icio.us Technorati Twitter
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07-22-2009, 11:38 PM	#3
HonjUopu Join Date Oct 2005 Posts 498 Senior Member	Assuming an emissivity of 1 (gonna be less than that), the visible power density would be on the order of ~0.1 W/m^2. Your eyes should be able to see 100 W/m^2. Share Share this post on Digg Del.icio.us Technorati Twitter
	Quote

07-22-2009, 11:54 PM	#4
Salliter Join Date Oct 2005 Posts 441 Senior Member	I know I know, but isn't a small part of the spectra ( on part with what was posted ) Vis? Spectroscopy and **... I loved you all once.... EDIT: fricking beaten by Ramo. Thanks for explaining blackbody radiation to me! However, you should be experienced enough by now to read between the lines of bad science journalism. The journalist is trying to get across that this isn't simple blackbody **, and he mentions fluorescence in the skin later on. Share Share this post on Digg Del.icio.us Technorati Twitter
	Quote

07-23-2009, 12:17 AM	#5
DghtRdc Join Date Oct 2005 Posts 517 Senior Member	Hot water (sometimes) freezes faster than cold water. Share Share this post on Digg Del.icio.us Technorati Twitter
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