If a photon’s frequency doubles, what happens to its energy?

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Multiple Choice

If a photon’s frequency doubles, what happens to its energy?

Explanation:
A photon's energy scales with its frequency: E = h f. Here, h is Planck’s constant and f is the frequency. If the frequency doubles, the energy per photon doubles as well because h stays the same and energy changes directly with frequency. This relation is independent of how bright the light is (the number of photons)—that would affect total energy, but the energy of each individual photon depends only on its frequency. So doubling the frequency leads to doubling the photon's energy.

A photon's energy scales with its frequency: E = h f. Here, h is Planck’s constant and f is the frequency. If the frequency doubles, the energy per photon doubles as well because h stays the same and energy changes directly with frequency. This relation is independent of how bright the light is (the number of photons)—that would affect total energy, but the energy of each individual photon depends only on its frequency. So doubling the frequency leads to doubling the photon's energy.

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