Do all bodies radiate at all frequencies?

[zeromodz]

I know that all bodies with a temperature above absolute zero radiate energy away as the following.

P = AeσT^4

However, I wanted to know how you could find the frequency of the power being emitted just by knowing the temperature. For example, how would I find out how much heat I need to put in a specific gas in order for it to radiate visible light (make it glow). I know that the hotter you get it, the more variety of frequencies you get.

 

[Drakkith]

This should help some: http://en.wikipedia.org/wiki/Black_body_radiation

But also be aware that gases are not perfect black bodies and will radiate in specific bands of the spectrum: http://en.wikipedia.org/wiki/Emission_spectrum

Perhaps you might want to try a solid object first?

 

[Andrew Mason]

I know that all bodies with a temperature above absolute zero radiate energy away as the following.

P = AeσT^4

However, I wanted to know how you could find the frequency of the power being emitted just by knowing the temperature. For example, how would I find out how much heat I need to put in a specific gas in order for it to radiate visible light (make it glow). I know that the hotter you get it, the more variety of frequencies you get.

The frequency distribution as a function of temperature is given by Planck's radiation law. See for example: http://en.wikipedia.org/wiki/Planck%27s_law"

AM