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PHY 102 Test Compilation PHY 102 28 Objective Question
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Question

The threshold wavelength of photoelectric emission of a metal is 4000 Angstroms. What is the minimum energy required to eject a photoelectron?
Options
A 4.96 eV
B 3.1 eV
Correct Answer
C 49.6 eV
D 31 eV
Correct Answer

Option B is the correct answer.

Detailed Explanation

E=hc/lambda0=(6.626e-34)(3e8)/(4e-7)=4.97e-19J=3.10eV.

Hint

E=hc/lambda0=(6.626e-34)(3e8)/(4e-7)=4.97e-19J=3.10eV.

Question Info

Course: PHY 102
Topic: Test Compilation PHY 102 28
Type: Objective
Difficulty: Not specified
Question 1624 of 1819
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