This is a neon lamp.
Red
yes
Its frequency (wavelength).
yellow, because green+red makes yellow in the addition of light!
Green light + red light in red, green, blue context makes yellow; in red, yellow, blue context, it makes white. RGB is used for computer screens, and RYB for reflected light such as from paintings.
Bring it to gamestop and get it fixed. It has red ring of death!
Sunlight.
red, to remember this all you have to do is think of death that makes you think of blood and blood is red.
you could refer to it as light red because it is just red mixed with white. blue is mixed with white and that makes light blue, so red and white can make light red, or pink.
Its frequency (wavelength).
White light!!! :D
red because red through red makes red! ;)