Question: In the photon picture of light, the light intensity I is related to the

A. magnitude of electric field E.B. frequency of light f.C. de Broglie wavelength . D. number of photons per secondE. number of photons per second

per area.

Question: When the intensity I of monochromatic light shining on a metal surface in vacuum is increased, the maximum kinetic energy of emitted electrons

A. increases.B. stays the same.C. decreases.

Question: When the frequency f of light shining on a metal surface in vacuum is increased, the maximum kinetic energy of emitted electrons

A. increases.B. stays the same.C. decreases.

Question: When the area of the metal surface is increased for light of fixed light intensity I and frequency f, the maximum kinetic energy of emitted electrons

A. increases.B. stays the same.C. decreases.

Question: Monochromatic red light with intensity I illuminates a metal surface and produces a certain stopping voltage Vred. If now monochromatic blue light with intensity I also illuminates the metal, the new stopping voltage V will

A. increaseB. stay the sameC. decrease

Question: True or false: the randomness of the appearance of monoenergetic electrons on a screen that have passed through a 2-slit experiment one-by-one disappears if one of the slits is closed.

Question: True or false: the collision of a photon with an electron in the Compton effect is an elastic collision (energy of the photon is unchanged).