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Which photon is more energetic: A red one or a violet one?

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in Physics – Class 12 by (135k points)
Which photon is more energetic: A red one or a violet one?

(a) Both

(b) Red

(c) Violet

(d) Neither

I have been asked this question in an interview for internship.

Question is from Photoelectric Effect in section Dual Nature of Radiation and Matter of Physics – Class 12

1 Answer

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Best answer
Right choice is (c) Violet

To explain: Violet photon has more energy because the energy of a photon is given as:

E = hv

Since energy is directly proportional to wavelength, i.e. vvoilet > vred, the violet photon is more energetic than the red photon.

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