Answers to Selected Problems - West Valley College
Answers to Selected Problems - West Valley College
Answers to Selected Problems - West Valley College
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Problem Sets Physics 4D<br />
Metal 1 has a larger work function than metal 2. Both are illuminated with the same short wavelength<br />
ultraviolet light. Do pho<strong>to</strong>electrons from metal 1 have a higher speed, a lower speed, or the same speed<br />
as pho<strong>to</strong>electrons from metal 2? Explain.<br />
Answer(s)<br />
Since electrons in metal 1 has a larger work function than in metal 2, they require more of the pho<strong>to</strong>n’s<br />
energy <strong>to</strong> be liberated from the material. Therefore, they will have a lower speed than the pho<strong>to</strong>electrons<br />
emitted from metal 2.<br />
Melvin J. Vaughn Page 36 of 61 <strong>West</strong> <strong>Valley</strong> <strong>College</strong>
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