The intensity of the light has no connection with the photoelectric effect.
That's what was so baffling about it before the particle nature of light
was suspected ... a match with a blue flame might stimulate the
photoelectric effect, but a high-power red searchlight couldn't do it.
Explanation:
A or E I think cous I use to do this in yr 7
A chemical change because it doesn't power anything or secrete anything except smoke.
