Answer: The correct answer is the scattering angle.
Explanation:
Compton effect is defined as the effect which leads to the increase in wavelength of monochromatic, electromagnetic radiation such as X-rays or gamma rays when the particles are scattered.
The equation for Compton effect, which is change in wavelength is given as:
[tex]\Delta \lambda=\lambda_f-\lambda_i=\frac{h}{m_ec}(1-\cos {\phi})[/tex]
where,
[tex]\Delta \lambda[/tex] = change in wavelength of radiation
h = Planck's constant = [tex]6.626\times 10^{-32}Js[/tex]
[tex]m_e[/tex] = mass of electron = [tex]9.11\times 10^{-31}kg[/tex]
c = speed of light = [tex]3\times 10^8m/s[/tex]
[tex]\cos \phi[/tex] = cosine function of scattering angle
As, seen from above the change in photon's wavelength depends scattering angle. All the other variables are constant.
Hence, the correct answer is the scattering angle.
