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The energy of a photon can be expressed using the formula E = hν or E = hc / λ. Which of the following represents this energy?

1. hc / λ
2. hν
3. λ / hc
4. None of the above

Correct answer: hc / λ

Solution

The energy of a photon is given by the formula E = hν, which can also be expressed as E = hc/λ by substituting ν = c/λ. Thus, the correct answer is hc/λ.

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