In this lesson, we will learn how to describe free electron scattering in the Compton effect and how to calculate photon momentum and radiation pressure.

Q1:

Find the energy of a photon with momentum 4 . 0 2 × 1 0 − 2 9 kg⋅m/s.

Q2:

A photon has a wavelength of 3.10 μm and an electron has the same momentum as this photon.

Calculate the momentum of the photon.

Find the velocity of the electron.

Find the kinetic energy of the electron.

Q3:

X-rays of wavelength 9.00 nm are scattered from a block of carbon at angles of 3 0 . 0 ∘ , 9 0 . 0 ∘ , and 1 8 0 ∘ .

What wavelength do the scattered photons have for a 3 0 . 0 ∘ angle of scattering? Write your answer to six significant figures.

What wavelength do the scattered photons have for a 9 0 . 0 ∘ angle of scattering? Write your answer to six significant figures.

What wavelength do the scattered photons have for a 1 8 0 ∘ angle of scattering? Write your answer to six significant figures.

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