How would you convert visible light to infrared or microwave

[ejnovek]

Is it possible to convert light in the visible spectrum to infrared or microwave light. What processes would be used to do this?

Thanks,

EJ

 

[jedishrfu]

You could shine light on some object that absorbs it and radiates heat (infrared) later on.

Also there the optical downconverter:

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

 

[rootone]

Although you can't do this at home, cosmic microwave background radiation is an example of this actually happening in nature.

 

[Blackberg]

Paint whatever black.