Converting Red Light Spectrum to Blue

[Ronie Bayron]

Hi,
Is there any known ways in Physics how to convert Red light to blue?

 

[mfb]

Upconversion, for example. Your question is very vague. Where does the red light come from and what do you want to do with the blue light?

 

[Ronie Bayron]

Upconversion, for example. Your question is very vague. Where does the red light come from and what do you want to do with the blue light?

Any possible light source.

 

[mfb]

Does "let the light shine on a photovoltaic cell, use the electricity to operate a source of blue light" count as well?
What about growing plants with red light, burning them in a power plant and operating a light source with it?
You see how vague the question is?

 

[Ronie Bayron]

Does "let the light shine on a photovoltaic cell, use the electricity to operate a source of blue light" count as well?
What about growing plants with red light, burning them in a power plant and operating a light source with it?
You see how vague the question is?

Can we keep the applications private. An effortless conversion is always best.

 

[russ_watters]

Get in a spaceship, travel away from earth, then turn around and travel toward it at high speed.

Sound absurd? Without knowing the constraints, that's all we can do. This type of free-form, idle speculation is not useful. Thread locked.