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:

Annually Compounded

Interest on an investment that is calculated and added to the principal sum once a year.

Rate of Return

The positive or negative change in the worth of an investment, quantified over a predetermined period and depicted as a percentage of the initial investment cost.

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