Two planes of a crystal are separated by 3.25 Angstroms (or 3.25 $\times$ 10^-10 m). Light of what wavelength shows constructive interference at a scattering angle of 17.5 degrees? A) 3.9 Angstroms B) 0.49 Angstroms C) 9.75 Angstroms D) 1.46 Angstroms E) 1.95 Angstroms

Question

Quizplus · Accepted Answer

Using Bragg's Law, nλ = 2d sin(θ), for n=1, λ = 2 * 3.25 * sin(17.5°) ≈ 1.95 Angstroms.

Two Planes of a Crystal Are Separated by 3 ×\times× 10-10 M)

Two Planes of a Crystal Are Separated by 3 $\times$ 10^-10 M)