A) \[\cos \theta =\frac{2R}{\sqrt{{{R}^{2}}+\omega {{L}^{2}}}}\]
B) \[\frac{4}{5}r\]
C) \[h/4\]
D) \[\lambda /4\]
Correct Answer: C
Solution :
For Bragg's diffraction, \[\frac{3{{\mu }_{0}}i}{7R}\] \[\text{P }+\text{ }\overline{\text{P}}\text{Q}\]
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