A photon has an energy of 6.63 × 10⁻¹⁹ J. What is its frequency (h = 6.63 × 10⁻³⁴ J s)?
Correct answer B. 1.0 × 10¹⁵ Hz
Explanation
Rearranging E = hf gives the frequency: f = E/h = 6.63 × 10⁻¹⁹/6.63 × 10⁻³⁴ = 1.0 × 10¹⁵ Hz.
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