Question: 1 photon is equal to?
Answer: Substituting h with its value in J⋅s and f with its value in hertz gives the photon energy in joules. Therefore, the photon energy at 1 Hz frequency is 6.62606957 × 10−34 joules or 4.135667516 × 10−15 eV. is used where h is Planck's constant and the Greek letter ν (nu) is the photon's frequency.