If the wavelength of light is halved, what happens to the energy of the photons?

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Question: If the wavelength of light is halved, what happens to the energy of the photons? (2020)

Options:

Correct Answer: It is doubled

Exam Year: 2020

Solution:

Energy is inversely proportional to wavelength. Halving the wavelength doubles the energy.

If the wavelength of light is halved, what happens to the energy of the photons? (2020)

If the wavelength of light is halved, what happens to the energy of the photons? (2020)

Step 1: Understand that light is made of particles called photons.
Step 2: Know that the energy of a photon is related to its wavelength.
Step 3: Remember the rule: Energy is inversely proportional to wavelength. This means that as the wavelength decreases, the energy increases.
Step 4: If the wavelength is halved, it means it is reduced to half its original size.
Step 5: Since the energy increases when the wavelength decreases, halving the wavelength will double the energy of the photons.

Photon Energy and Wavelength – The energy of a photon is inversely proportional to its wavelength, described by the equation E = hc/λ, where E is energy, h is Planck's constant, c is the speed of light, and λ is the wavelength.