Question Detail

PHY 104 Photo Electric Emission Objective Question
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Question

What is the significance of the threshold frequency (f_cutoff) in the Photoelectric Effect?
Options
A It is the frequency at which the emitted current is maximized.
B It is the minimum frequency of light required to eject electrons instantaneously from a given substance.
Correct Answer
C It is the frequency at which the stopping potential is highest.
D It is the frequency above which the work function becomes zero.
Correct Answer

Option B is the correct answer.

Detailed Explanation

Page 4 defines 'THRESHOLD FREQUENCY' as 'the frequency minimum frequency that produce photoelectron emission instantaneously from a given substance.'

Hint

The term 'threshold' implies a minimum condition.

Question Info

Course: PHY 104
Topic: Photo Electric Emission
Type: Objective
Difficulty: Not specified
Question 184 of 947
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