In the photon energy equation, the letter h stands for:
AThe hour elapsed
BPlanck's constant
CThe wave height
DThe heat capacity
Answer & Solution
Correct answer: B. Planck's constant
1. The equation has two named quantities besides energy.
2. Photon energy is written as E equals h times f.
3. In that equation h is Planck's constant.
4. The letter f is the frequency of the associated light wave.
_Source: OpenStax College Physics for AP Courses 2e (CC BY 4.0), Ch 29 'Quantum Physics', sections 29.1-29.8_
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