A Stopping Potential of 3

question 20

Multiple Choice

A stopping potential of 3.2 V is needed for radiation whose wavelength is 200 nm. What is the work function (in eV) of the material?

• A) 4.0
• B) 3.0
• C) 5.0
• D) 6.0
• E) 2.0

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Definitions:

Critical Value

A threshold in a statistical test that defines the boundary for deciding whether an observed statistic is extreme enough to reject the null hypothesis.

Alpha

A threshold value used in hypothesis testing to determine the significance level at which the null hypothesis is rejected in favor of the alternative hypothesis.

Non-directional Hypothesis

A hypothesis that does not predict the specific direction of the difference or relationship, only that one exists.

T-statistic

A statistic calculated from sample data used to assess the plausibility of the null hypothesis in t-tests.