Question

Be sure to answer all parts. A photon has a wavelength of 685 nm. Calculate the energy of the photon in joules. Enter your answer in scientific notation.

Answer 1

Energy of the photon is 2.90×10⁻¹⁹J

Step-by-step explanation:

Hello,

The question above requires us to calculate the energy of a photon with a specific wavelength. To do this, we need to relate energy and wavelength through and equation.

E = hc/λ

E = energy of the photon

h = Planck's constant = 6.626×10⁻³⁴Js

c = speed of light = 3.0×10⁸m/s

λ = wavelength of the photon = 685nm = 685×10⁻⁹m

E = [6.626×10⁻³⁴ × (3.0×10⁸)] / 685×10⁻⁹

E = 2.90×10⁻¹⁹J

The energy of the photon is 2.90×10⁻¹⁹J