Chapter 38, Problem 32A

To determine

The effect of the wavelength of the light on the photon energy.

Explanation of Solution

Introduction:

The energy of the photon depends on the frequency of the light. The wavelength of the light is inversely proportional to frequency of the light. If the wavelength of the light increases then the frequency of the light decreases.

The wavelength of the light becomes double, so the frequency of the light become half of the initial frequency. The frequency of the light becomes half, so the energy of the photon also become half because the energy of the photon depends on the frequency of the light.

Conclusion:

The energy of the photon becomes half due the doubling the wavelength of the light because the energy of the photon varies inversely with increase in the wavelength of the light.