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"A beam of x rays of wavelength 0.20nm is diffracted by a set of planes in a crystal whose separation is 3.1×10−8 cm. The smallest angle between the beam and the crystal planes for which a reflection occurs is:"

"

A. 0.70rad

B. 0.33rad

C. 0.033rad

D. 0.066rad

E. no such angle exists"

Answers (1)

dipendu 09-03-2013
C. 0.033rad
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