Question

The frequency of an electromagnetic radiation is 2?10^15 Hz. What is the energy of photon in eV

Answer 1

Dear Student,

The amount of energy in photons is calculated by this equation, E = hf, where E is the energy of the photon in Joules; h is Planck's constant, which is always 6.63 * 10^-34 Joule seconds; and f is the frequency of the light in hertz.
Given f = 2x10¹⁵ Hz
E = 2x10¹⁵ x 6.63 * 10^-34
= 13.26 x 10^-19 J
Convert to electronvolt eV divide by 1.602176634×10⁻¹⁹ we get
13.26 / 1.6 = 8.2875 eV

Answer: The energy of photon will be 8.2875 eV

Regards