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PHY 104 PHY 104 Past Questions Objective Question
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Question

The emission spectrum of gold shows a line of wavelength 2.676 × 10⁻⁷ m. How much energy is emitted as the excited electron falls to the lower energy level?
Options
A 7.43 × 10⁻¹⁹ J
Correct Answer
B 5.30 × 10⁻²⁰ J
C 6.05 × 10⁻¹⁹ J
D 3.60 × 10⁻²⁰ J
Correct Answer

Option A is the correct answer.

Detailed Explanation

E = hc/λ = (6.626e-34 × 3e8) / 2.676e-7 = 1.9878e-25 / 2.676e-7 = 7.428 × 10⁻¹⁹ J.

Hint

Use E = hc/λ.

Question Info

Course: PHY 104
Topic: PHY 104 Past Questions
Type: Objective
Difficulty: Not specified
Question 926 of 947
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