The First order reflection ( n=1 ) from a crystal of the X-ray from a Copper anode tube (\lambda=1.54 Å) occurs at an angle of 45^{\circ}. What is the distance between the set of plane causing the diffraction?

GUJCET 2011 Chemistry Solved Paper

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The First order reflection ( n=1 ) from a crystal of the X-ray from a Copper anode tube (λ=1.54Å) occurs at an angle of 45∘. What is the distance between the set of plane causing the diffraction?

0.1089‌nm.
0.1089m.
10.89Å
1.089×10−9m.

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