PhysicsElementary modern physicsJAMB
Find the energy of a photon of frequency 5 × 10¹⁴ Hz. (h = 6.6 × 10⁻³⁴ J s)
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Answer: B. 3.3 × 10⁻¹⁹ J
E = hf = 6.6 × 10⁻³⁴ × 5 × 10¹⁴ = 3.3 × 10⁻¹⁹ J.
An AdmitMe practice question, written for the JAMB syllabus. Not an official past question.