The energy E, frequency ν, and wavelength λ of a photon are related by E = h ν ν = h c λ λ = 4.135 667 696 × × 10 − − 15 e V / H z × × 299 792 458 m / s λ λ where h is the Planck constant, c is the speed of light. This reduces to ‍ E = 4.135 667 696 × × 10 − − 15 e V / H z × × ν ν = 1 239.841 98 e V ⋅ ⋅ n m λ λ . A photon with a wavelength of 532 nm (green light) would have an energy of approximately 2.33 eV. Similarly, 1 eV would correspond to an infrared photon of wavelength 1240 nm or frequency 241.8 THz.