1. Explain briefly how the photoelectric effect is used in the operation of at least two of the following: an electric eye, a photographer’s light meter, the sound track of a motion picture. 2. Does...

1. Explain briefly how the photoelectric effect is used in the operation of at least two of the following: an electric eye, a photographer’s light meter, the sound track of a motion picture.

2. Does the photoelectric effect prove that light is made up of particles? Do interference experiments prove that light is composed of waves? (Is there a distinction between what something is and how it behaves?)