Question

A photon has a wavelength of approximately 2 x 10-7m. What is the energy, in joules, associated with this photon?

Answer 1

Answer:

E = 9.95×10⁻¹⁹ J

Explanation:

Given data:

Wavelength = 2×10⁻⁷ m

Energy of photon = ?

Solution:

Formula:

E = hc/λ

h = 6.63×10⁻³⁴ Js

c = 3×10⁸ m/s

by putting values,

E =  6.63×10⁻³⁴ Js × 3×10⁸ m/s / 2×10⁻⁷ m

E = 19.89×10⁻²⁶Jm / 2×10⁻⁷ m

E = 9.95×10⁻¹⁹ J