Question Detail

PHY 104 PHY 104 Past Questions Objective Question
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Question

Photons with energies of 3.9 × 10⁻¹⁹ J strike a photoemissive surface whose work function is 2.9 × 10⁻¹⁹ J. The maximum kinetic energy of the ejected photoelectrons is
Options
A 1.0 × 10⁻¹⁹ J
Correct Answer
B 7.5 × 10⁻²⁰ J
C 7.0 × 10⁻¹⁹ J
D 1.2 × 10⁻¹⁹ J
Correct Answer

Option A is the correct answer.

Detailed Explanation

The maximum kinetic energy is K_max = E_photon - φ = 3.9e-19 - 2.9e-19 = 1.0 × 10⁻¹⁹ J.

Hint

Use K_max = hf - φ.

Question Info

Course: PHY 104
Topic: PHY 104 Past Questions
Type: Objective
Difficulty: Not specified
Question 827 of 947
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