Laser radiation with a wavelength of 650 nm is normally incident on the mirror surface of a solid

Laser radiation with a wavelength of 650 nm is normally incident on the mirror surface of a solid. What momentum does each incident photon impart to the surface?

λ = 650 nm = 650 * 10 ^ -9 m.
h = 6.6 * 10 ^ -34 J * s.
R – ?
The photon momentum p is determined by the formula: p = h / λ, where h is Planck’s constant, λ is the photon wavelength.
p = 6.6 * 10 ^ -34 J * s / 650 * 10 ^ -9 m = 0.0101 * 10 ^ -25 kg * m / s.
Answer: a photon pulse of laser radiation p = 0.0101 * 10 ^ -25 kg * m / s.