The charge on a piece of metal can be “watched” fairly easily by connecting it to an electroscope, a device with thin leaves that repel when a net charge is present. You place a large excess negative charge on a piece of metal, then separately shine light sources of two pure but different colors at it. The first source is extremely bright, but the electroscope shows no change in the net charge. The second source is feeble, but the charge disappears, Appealing to as few fundamental claims as possible, explain to your friend what evidence this provides for the particle nature of light,
We need at least 10 more requests to produce the solution.
0 / 10 have requested this problem solution
The more requests, the faster the answer.