In regard to the Compton scattering experiment with x-rays incident upon a carbon block, as the scattering angle becomes larger, what happens to the magnitude of difference between the incident and scattered wavelengths?
a. increases
b. decreases
c. remains constant
d. difference is maximum at a 45 angle of scatter
[Ques. 2] X-rays of wavelength of 0.0656 nm undergo Compton scattering from free electrons in carbon. What is the wavelength of photons scattered at 82.5 relative to the incident beam? (h = 6.63 1034 Js, me = 9.11 1031 kg, c = 3.00 108 m/s, and 1 nm = 109 m)
a. 0.0656 nm
b. 0.0677 nm
c. 0.0848 nm
d. 0.0719 nm
e. 0.0659 nm
[Ques. 3] The Compton experiment demonstrated which of the following when an x-ray photon collides with an electron?
a. Momentum is conserved.
b. Energy is conserved.
c. Momentum and energy are both conserved.
d. Wavelength of scattered photon equals that of incident photon.
[Ques. 4] The spacing between atoms in KCl crystal is 3.1 1010 m. At what angle from the surface will a beam of 2.23 1011-m x-rays be constructively scattered?
a. 30
b. 2.1
c. 0.11
d. 20
e. 64
[Ques. 5] Bragg reflection results in a first-order maximum at 12.2. In this case, at what angle would the second-order maximum occur?
a. 24.4
b. 12.2
c. 7.79
d. 25.0
e. 78.5
[Ques. 6] In an x-ray diffraction experiment, using x-rays of wavelength = 0.434 1010 m, a first-order maximum occurred at 8 off the crystal plane. Find the distance d between crystal planes.
a. 1.56E10 m
b. 2.19E11 m
c. 4.88E10 m
d. 1.70E9 m
e. 3.12E10 m
[Ques. 7] Rosalind Franklin was
a. the maiden name of the wife of a president.
b. the producer of the x-ray diffraction photographs that led to the DNA structure.
c. the person who discovered that salt forms a crystal.
d. the discoverer of x-rays.
[Ques. 8] In Bragg's law, 2d sin = m, how is measured?
a. from the reflecting crystal plane
b. from the normal to the reflecting crystal plane
c. from the direction of the incident beam
d. from the normal to the direction of the incident beam
[Ques. 9] Who conceived the idea of using a crystal for observing diffraction of x-rays?
a. Roentgen
b. von Laue
c. W. L. Bragg
d. W. H. Bragg
[Ques. 10] An important use of x-ray diffraction was:
a. the observation of Compton scattering.
b. determining the structure of the DNA molecule.
c. production of positrons.
d. observation of the photoelectric effect.
Quick Reply
