1. According to the uncertainty principle,

(a) There is always an uncertainty in a measurement of the position of a particle.

(b) There is always an uncertainty in a measurement of the momentum of a particle.

(c) There is always an uncertainty in a simultaneous measurement of both the position and momentum of a particle.

(d) All of the above.

2. Which of the following is not always a property of lasers?

(a) All of the photons in laser light have the same phase.

(b) All laser photons have nearly identical frequencies.

(c) Laser light moves as a beam, spreading out very slowly.

(d) Laser light is always brighter than other sources of light.

(e) Lasers depend on an inverted population of atoms where more atoms occupy a higher energy state than some lower energy state.