The energy of a photon varies directly with its

The energy of the photon using Einstein relation is given by: 

\(E=hν \)

With c = ν λ

The energy equation can also be written as:

\(E=h\frac{c}{\lambda }\)

c = velocity of light

ν = frequency

λ = wavelength of the photon or color, taken into consideration

Observation:

• The energy of a photon varies directly with frequency, i.e. E ∝ ν
• The energy of a photon varies inversely with the wavelength, i.e. \(E\propto\frac{1}{\lambda}\)