alleryStart learning →Doubling the frequency of light doubles the photon energy because energy is:
AIndependent of frequency
BSquared in frequency
CProportional to frequency
DInverse to frequency
Answer & Solution
Correct answer: C. Proportional to frequency
1. The photon energy equation makes the dependence exact.
2. Photons are individual energy packets of electromagnetic waves.
3. Photon energy is h times f, with h Planck's constant.
4. Planck's constant does not change, so energy scales with f alone.
5. Energy is therefore proportional to frequency, and doubling f doubles the energy.
_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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