Question

The momentum of a photon with a wavelength of 725 nm is:

A) 9.14 × 10-28 kg ∙ m/s

B) 9.14 × 10-25 kg ∙ m/s

C) 9.14 × 10-31 kg ∙ m/s

D) 9.14 × 10-21 kg ∙ m/s

E) 9.14 × 10-45 kg ∙ m/s

Answer 1

use debroglie's formula\[ \lambda = \frac{h}{m*v}\] where \(m*v\) is your momentum