Question Detail

PHY 104 PHY 104 Past Questions Objective Question
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Question

A beam of ultraviolet light has a wavelength 150 nm. How much energy does a photon of this ultraviolet light have in joules?
Options
A 2.50 × 10⁻¹⁹ J
B 5.10 × 10⁻¹⁸ J
C 3.15 × 10⁻¹⁹ J
D 1.33 × 10⁻¹⁸ J
Correct Answer
Correct Answer

Option D is the correct answer.

Detailed Explanation

E = hc/λ = (6.626e-34 × 3e8) / (150e-9) = 1.9878e-25 / 1.5e-7 = 1.3252e-18 J ≈ 1.33e-18 J.

Hint

Use E = hc/λ.

Question Info

Course: PHY 104
Topic: PHY 104 Past Questions
Type: Objective
Difficulty: Not specified
Question 800 of 947
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