Question

Higher energy photons have a). Longer wavelengths b). Greater speed c). Higher frequency d). All of the above

Answer 1

The energy of the photons in the terms of frequency is,

`E=hf`

where h is the Planck's constant and f is the frequency,

Thus, with the increase in energy of the photons, the frequency of the photons also increases.

The frequency of the photons in terms of the wavelength is,

`f=(c)/(\lambda)`

where,

`\lambda\text{ is the wavelength of the photons}`

Thus, with the increase in the frequency (energy) of the photons, the wavelength of the photons decreases (shorter wavelength).

The speed of the photons is equal to the speed of the light in some medium. That speed depends upon the medium through which the light or the photons passes and does not depend upon the energy of the photon.

Thus, the speed of the photon remains unchanged.

Hence, option c (high frequency) is the correct answer.