What was Erwin Schroedinger's main contribution to the development of quantum theory?
A) He explained the photoelectric effect, in terms of photons.
B) He found a way to predict the overall statistical patterns that appear in the double-slit experiment with electrons and other experiments.
C) He discovered the uncertainty principle.
D) He found a way to predict the precises position at which electrons or other particles will strike the viewing screen in such experiments as the electron double-slit experiment.
E) He discovered the nonlocality principle.
Question 2
Two in-phase loudspeakers are placed along a wall and are separated by a distance of 4.00 m. They emit sound with a frequency of 514 Hz. A person is standing away from the wall, in front of one of the loudspeakers.
What is the closest distance from the wall the person can stand and hear destructive interference? The speed of sound in air is 343 m/s.
A) 0.34 m B) 1.2 m C) 0.73 m D) 0.37 m E) 1.6 m
