Question

can a substance burn any color?
yes, it can absorb any amount of energy and remit in the form of light
no, it can only absorb certain amounts of energy and remit it as light
yes, it only depends on the temperature of the flame
no, it depends on what it is bonded to

which are the only electromagnetic waves that humans can see? (select all that apply)
xrays
radiowaves
visible light
microwaves
infred light
gamma rays
ultra violet light

Explanation:

1. For the first question, atoms and molecules can only absorb and emit specific quantized amounts of energy. This results in characteristic emission spectra and thus not any color can be produced upon burning.
2. For the second question, among the electromagnetic - wave spectrum, only visible light is in the range that can be detected by the human eye.

Answer:

1. No, it can only absorb certain amounts of energy and remit it as light
2. visible light