An X ray having a wavelength of 1.67 x 10-10 undergoes the first-ord – McqOptions

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1.	An X ray having a wavelength of 1.67 x 10-10 undergoes the first-order reflection. What is the glancing angle ( ) if the spacing between the two planes is 6 x 10-10?
A.	6.25
B.	8.99
C.	7
D.	8
Answer» E.

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