Temperature and color - why hot objects glow red?

[i.mehrzad]

Is there any reason why most hot things alost always begin to get the tinge of red??

 

[jonegil]

hi mehrzad...yeah there is a reason...it is related to their thermic radiation spectrum...when you heat up an object like a piece of iron...it will emit higher energetic radiations...from Infra-Red it changes to Red...then Orange...Yellow...White...Blue...UV...and so on

(wavelength peak)=(B)/(Temperature)----»for a blackbody

 

[malawi_glenn]

http://en.wikipedia.org/wiki/Black_body

http://en.wikipedia.org/wiki/Planck's_law_of_black_body_radiation

 

[jonegil]

if you want to know more about this branch of thermodynamics...look for ultraviolet catastrophe, it's interesting

 

[CraigD]

Remember red is cold and blue is hot. I still don't recommend touching a piece of steel that is red.

CraigD, AMInstP
www.cymek.com