Question Detail

PHY 104 Photo Electric Emission Objective Question
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Question

According to the document, what does a different y-intercept on a V-stop vs. frequency graph signify for different target materials?
Options
A A different Planck's constant.
B A different kinetic energy of emitted electrons.
C A different work function for the material.
Correct Answer
D A different stopping potential for the material.
Correct Answer

Option C is the correct answer.

Detailed Explanation

Page 5 mentions, 'y intercept is different for different target materials.' and the equation Vstop = (h/e)f - W/e shows the y-intercept is -W/e. Therefore, a different y-intercept implies a different work function (W).

Hint

Refer back to the rearranged Einstein's equation and the meaning of the y-intercept.

Question Info

Course: PHY 104
Topic: Photo Electric Emission
Type: Objective
Difficulty: Not specified
Question 187 of 947
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