1. Which of the following is necessarily true?
(a) Red light has more energy than violet light.
(b) Violet light has more energy than red light.
(c) A single photon of red light has more energy than a single photon of violet light.
(d) A single photon of violet light has more energy than a single photon of red light.
(e) None of the above.
(f) A combination of the above (specify).
2. If a photon of energy E ejects electrons from a metal with kinetic energy KE, then a photon with energy E 2
(a) Will eject electrons with kinetic energy KE/2.
(b) Will eject electrons with an energy greater than KE/2.
(c) Will eject electrons with an energy less than KE/2.
(d) Might not eject any electrons.
3. If the momentum of an electron were doubled, how would its wavelength change?
(a) No change.
(b) It would be halved.
(c) It would double.
(d) It would be quadrupled.
(e) It would be reduced to one-fourth.