In Compton scattering, the change in wavelength is maxed if_______________?
Correct answer: C. The angle of scattering is 180°
- A. The angle of scattering is 90°
- B. The angle of scattering is 60°
- C. The angle of scattering is 180°
- D. The angle of scattering is 0
Explanation
The Compton shift is Δλ = h(1 - cos θ)/(m_ec), so it is largest when cos θ = -1, which occurs at θ = 180°. At zero scattering angle, the shift is zero. Students may choose 90° because it is a familiar right-angle scattering case, but it does not give the maximum value.
Last updated
About Photons and the Particle Model of Light
The particle model treats light as photons with energy E equals hf and momentum related to wavelength. Questions involve the photoelectric effect, work function, threshold frequency, stopping potential and photon energy, while distinguishing particle behaviour from the wave description of interference and diffraction.
Practise Dawn of Modern Physics
739 free Dawn of Modern Physics MCQs from Physics, each with the correct answer and an explanation. Unlimited attempts, no account needed.
Exams that ask Physics questions like this
Physics is on 13 papers prepared for on TestUstad, and all of them draw the same bank, so this question is worth knowing for every one of them.
Related questions
A ball of mass 1g is moving with a velocity of 10³ m/s. The De_Broglie wavelength of the ball is:
A beam of light of wavelength "λ" and with illumination "L" falls on a clean surface of sodium. If "N" photoelectron are emitted each with kinetic energy E:
A change in energy of a photon occurs when it collides with an electron at rest and is known as:
A device whose working is based upon photoelectric effect is:
A particle of mass 5 mg moves with a speed of 8 m/s. Calculate its de Broglie wavelength (h = 6.63 x 10^-34 J s).