I am curious as if it is possible to change the color of light being emitted from a light bulb or LED.
The theory is if you were to use a frequency generator, up to above UV hrz, and used an amplifier to power the light bulb, one might be able to change the color of the light emitted.
As a standard filament bulb is powered by DC current, as in a flashlight, the filament gets hot and glows. If a similar filament bulb is powered by AC current like a typical desk lamp, the filament gets hot and glows.
I wonder if frequency would have any effect on how the filament emits light.
I do believe however that with a non-filament light like an LED would change color.
Also what about GAS lights like Neon or other gas tube lights?
Anyone have insight on this? Thanks.