A Crystal Diffracts a Beam of Electrons, Like a Diffraction

question 36

Short Answer

A crystal diffracts a beam of electrons, like a diffraction grating, as they hit it perpendicular to its surface. The crystal spacing is 0.18 nm, and the first maximum scattering occurs at 80° relative to the normal to the surface. (e = 1.60 × 10^-19 C, m_electron = 9.11 × 10^-13 kg, h = 6.626 × 10^-34 J ∙ s)
(a) What is the wavelength of the electrons?
(b) What potential difference accelerated the electrons if they started from rest?

Recognize the impact of statistical analysis in evaluating arguments and making generalizations.

Identify the misuse of numbers in arguments and the importance of using appropriate descriptive measures.

Understand the applications and limitations of computer scoring for written submissions.

Recognize the significance and implications of probabilistic generalization in logical reasoning.

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