If the wavelength of a photon is doubled, what happens to its energy?
A) It is halved.
B) It stays the same.
C) It is doubled.
D) It is quadrupled.
E) It is reduced by one-fourth.

Question

Quizplus · Accepted Answer

The energy of a photon is inversely proportional to its wavelength. As wavelength doubles, energy must halve to maintain this relationship. This is evident from the equation E=hc/λ (where E is energy, h is Planck's constant, c is the speed of light, and λ is wavelength) – as λ doubles, E must halve for the equation to remain balanced.

If the Wavelength of a Photon Is Doubled, What Happens