What equation is used to calculate the energy of a photon?

Answer 1

Planck's Equation,
E = hv
Where E is the energy contained within the photon of light, h is Plank's constant, and v is the frequency of the light.

Planck's constant, h, = 6.626068 X 10 ^ -34 J s and frequency of light = speed of light / wavelength

this is not only used in light but also to find energy of all electromagnetic radiation

Answer 2

Energy = hc/λ

h = Planck's constant (6.626 × 10-34 m2 kg/s)

c = the speed of light (3.00 × 108 m/s)

λ = the wavelength

Example question: What is the energy of a photon with a wavelength of 700 nm?

Convert the wavelength to meters (1 nm = 10-9 m)

700 nm = 700 × 10-9 m

Energy = (6.626 × 10-34)(3.00 × 108) ÷ (700 × 10-9) = 2.84 × 10-19 J

Answer 3

E = photon energy
h = Planck's constant
c = speed of light
F = frequency
L = wavelength

E = h F

which is the same as saying

E = h c / L

There's your photon energy in terms of wavelength.

Answer 4

E=hf is the formula for photon energy, where:

E - The energy of a single photon of light (J)

h - Planck constant (6.63 x 10-34 Js)

f - Wavelength of photon (m)