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PHY 104 PHY 104 Past Questions Objective Question
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Question

What is the cut off frequency of the radiation that could eject photoelectrons from sodium which has a work function of 2.3 eV?
Options
A 3.68 × 10^19 Hz
B 3.47 × 10^33 Hz
C 2.50 × 10^20 Hz
D 5.55 × 10^14 Hz
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

f₀ = φ/h = (2.3 × 1.602e-19) / (6.626e-34) = 3.6846e-19 / 6.626e-34 = 5.56 × 10^14 Hz.

Hint

Use f₀ = φ/h.

Question Info

Course: PHY 104
Topic: PHY 104 Past Questions
Type: Objective
Difficulty: Not specified
Question 849 of 947
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