The correct answer is B. Frequency.
The energy of a photon is proportional to its frequency. This means that the higher the frequency of a photon, the more energy it has. The frequency of a photon is inversely proportional to its wavelength. This means that the shorter the wavelength of a photon, the higher its frequency and the more energy it has.
The speed of a photon is always the same, regardless of its frequency or wavelength. The speed of light in a vacuum is 299,792,458 meters per second.
A. Wavelength is the distance between two consecutive crests or troughs of a wave. The wavelength of a photon is inversely proportional to its frequency. This means that the shorter the wavelength of a photon, the higher its frequency and the more energy it has.
C. Speed is the distance traveled divided by the time it takes to travel that distance. The speed of a photon is always the same, regardless of its frequency or wavelength. The speed of light in a vacuum is 299,792,458 meters per second.