Question

What is the energy of a photon of red light with a wavelength of 6.47 x 10-7 m ?

Answer 1

Answer:

3.44×10-27 joules.

Explanation:

E = h * c / λ = h * f,

E is the energy of a photon

h is the Planck constant

c is the speed of light

λ is the wavelength