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A laser emits light of frequency 6.0 × 10¹⁴ Hz. What is each photon's energy?
A3.98 × 10⁻¹⁵ J
B2.5 × 10⁻¹⁸ J
C3.98 × 10⁻¹⁹ J
D9.0 × 10⁻²⁰ J
Answer & Solution
Correct answer: C. 3.98 × 10⁻¹⁹ J
E = hν = 6.63 × 10⁻³⁴ J s × 6.0 × 10¹⁴ Hz = 3.98 × 10⁻¹⁹ J.
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