The largest x-ray wavelength that can be diffracted by crystal planes with a separation of 0.316 nm is:
A) 0.158 nm
B) 0.316 nm
C) 0.474 nm
D) 0.632 nm
E) 1.26 nm

Question

Quizplus · Accepted Answer

The largest wavelength that can be diffracted is twice the plane separation, according to Bragg's law (nλ = 2d sin θ, with θ = 90° for maximum wavelength). Thus, λ = 2 * 0.316 nm = 0.632 nm.

The Largest X-Ray Wavelength That Can Be Diffracted by Crystal