How are wavelength, frequency, and energy related for photons of light?
A)Longer wavelength means higher frequency and lower energy.
B)Longer wavelength means lower frequency and higher energy.
C)Longer wavelength means lower frequency and lower energy.
D)Longer wavelength means higher frequency and higher energy.
E)There is no simple relationship because different photons travel at different speeds.

Question

Quizplus · Accepted Answer

Longer wavelengths correspond to lower frequencies, according to the wave equation $v = f\lambda$, where $v$ is the speed of light (a constant), $f$ is the frequency, and $\lambda$ is the wavelength. Since the energy of a photon is given by $E = hf$, where $h$ is Planck's constant and $f$ is the frequency, lower frequency means lower energy.

How Are Wavelength, Frequency, and Energy Related for Photons of Light