Light Falling on the Surface of a Metal Such as Cesium

question 70

Multiple Choice

Light falling on the surface of a metal such as cesium can liberate electrons from the metal.The kinetic energy of electrons emitted from a metal can be increased by

• A)using light of higher frequency.
• B)using light of lower frequency.
• C)increasing the intensity of the incident light.
• D)using a metal with a greater work function.
• E)None of these is correct.

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Definitions:

Interposition

A visual cue for depth perception where one object partially blocks the view of another, indicating the former is closer to the observer.

Retinal Disparity

A binocular cue for perceiving depth based on the fact that the two eyes view the world from slightly different angles, creating a disparity that the brain interprets as depth.

Precognition

The phenomenon of knowing or sensing something before it happens, often associated with psychic abilities.

High Need

A strong requirement or desire for something, which could be physical, emotional, or psychological.