Question Detail

PHY 104 Photo Electric Emission Objective Question
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Question

What is actually observed regarding the photoelectric current as the frequency of light increases?
Options
A Current immediately flows at any frequency.
B Current starts to flow only when the frequency exceeds a specific threshold frequency (f-co).
Correct Answer
C Current decreases as frequency increases.
D Current is maximized at a specific frequency and then decreases.
Correct Answer

Option B is the correct answer.

Detailed Explanation

The green line in the 'Icurrent vs f-co frequency of light' graph on page 2, under 'We now show in green what actually happens', clearly indicates that current only appears once the frequency surpasses 'f-co', the threshold frequency.

Hint

Focus on the 'green' graphs on page 2, especially the one showing current versus frequency.

Question Info

Course: PHY 104
Topic: Photo Electric Emission
Type: Objective
Difficulty: Not specified
Question 225 of 947
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