A Photocathode Having a Work Function of 2

question 19

Multiple Choice

A photocathode having a work function of 2.4 eV is illuminated with monochromatic light whose photon energy is 3.4 eV.What is maximum kinetic energy of the photoelectrons produced? (c = 3.00 × 10⁸ m/s,h = 6.626 × 10^-34 J ∙ s,1 eV = 1.60 × 10^-19 J)

• A)1.6 × 10^-19 _J
• B)3.8 × 10^-19 _J
• C)4.4 × 10^-19 _J
• D)4.9 × 10^-19 _J
• E)5.4 × 10^-19 _J

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Definitions:

Marginal Product

The additional output gained by employing one more unit of input, such as labor or capital.

Marginal Product

The extra output that is produced by using one more unit of a factor, such as labor or capital, while keeping other factors constant.

Ceteris Paribus

A Latin phrase meaning "all other things being equal," used in economics to isolate the effect of one variable.

Production

The process of combining various material inputs and immaterial inputs (plans, know-how) to make something for consumption.