Disclaimer: I am not an electrical engineer, and nowhere near studying it either. This is just a curious question which I got and couldn't find an answer to.
I am aware of how several pixels are used to make up a television screen. Each pixel consists of 3 LEDs; one red, one blue, and one green. By varying the intensity of either the red, green, or blue; it's possible to bring about any possible color that exists.
My question is, what are the wavelengths of the light that these blue, green and red LEDs emit? Does it depend on TV to TV or is it general?