Photoelectrons Are Ejected When Monochromatic Light Shines on a Freshly-Prepared

question 43

Multiple Choice

Photoelectrons are ejected when monochromatic light shines on a freshly-prepared (oxide-free) sodium surface. In order to obtain the maximum increase in the number of electrons ejected per second, the experimenter needs to

• A) increase the frequency of the light.
• B) increase the intensity of the light.
• C) increase the area illuminated by the light.
• D) do all of the above.
• E) do only (b) and (c) above.

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Definitions:

Phi

Represents the Golden Ratio, approximately equal to 1.618, which is considered aesthetically pleasing in art and architecture; also a symbol used in psychology by Wolfgang Köhler for the phi phenomenon, an optical illusion of perceived motion.

Motion Parallax

A depth cue in which objects closer to the observer move faster across the visual field than objects farther away, giving a sense of depth and distance.

Figure Ambiguity

The quality of an image or representation that leads to multiple interpretations due to its unclear form.

Interposition

A visual cue in depth perception where one object partly covers another, indicating that the former is closer to the viewer than the latter.