If the Work Function of a Metal Surface Is 2

question 18

Multiple Choice

If the work function of a metal surface is 2.20 eV,what frequency of incident light would give a maximum kinetic energy of 0.25 eV to the photoelectrons ejected from this surface? (1 eV = 1.60 × 10^-19 J,h = 6.626 × 10^-34 J ∙ s)

• A)2.05 × 10¹⁴ Hz
• B)1.02 × 10¹⁴ Hz
• C)2.50 × 10¹⁴ Hz
• D)3.53 × 10¹⁴ Hz
• E)5.92 × 10¹⁴ Hz

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Definitions:

Manipulate to Obtain

A strategic action of influencing or controlling someone or something to achieve a desired outcome.

Fixed-Ratio Schedule

In operant conditioning, a reinforcement schedule that reinforces a response only after a specified number of responses.

Specified Time

A clearly defined or identified moment or period on a timeline.

Unpredictable Time

Moments or durations that cannot be anticipated or forecasted with certainty.