Click on a question number!






































1.
"Laser" stands for "light amplification by stimulated emission of radiation."  What is stimulated emission?

Answer





































2.
Compton showed that X-rays increase their ________ when they scatter from metal.
(You can check 0, 1, or 2 boxes before submitting.)

energy
wavelength







































3.
All else being equal, particles act like long-wavelength waves if they

are moving fast
have little mass
are highly charged
are dark-colored






































4.
For an electron making a downward quantum leap between a given pair of energy levels, stimulated emission and spontaneous emission differ in the _______ of the emitted light.

(You can check 0, 1, or 2 boxes before submitting.)

direction
wavelength







































5.
Why did BKS theory violate conservation of energy?

Answer





































6.
In Robert Millikan's mind, his refined studies of the photoelectric effect established that

(You can check 0, 1, or 2 boxes before submitting.)

the metal's temperature matters greatly
light consists of quanta







































7.
If de Broglie was right in saying that material particles also have wave properties, why don't macroscopic objects like baseballs and cars exhibit wavelike behavior?

Answer





































8.
Bothe and Geiger followed up on the initial Compton scattering experiment and found that recoiling electrons are produced ___________ the scattered X-rays.

before
at the same time as
after
sometimes before, sometimes after