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Monochromatic high energy x-rays are incident on a crystal. If 1st order reflection is observed at an angle $(3.4)^0$, at what angle would 2nd order reflection be expected.
written 7.3 years ago by gravatar for teamques10 teamques10 ★ 64k •   modified 7.3 years ago

Mumbai University > First Year Engineering > Sem 1 > Applied Physics 1

Marks: 3M

Year: Dec 2015
engineering physics
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written 7.3 years ago by gravatar for teamques10 teamques10 ★ 64k

Since, 1st order reflection is observed at an angle $(3.4)^0$

According to reflection formula,

nλ = 2d sinӨ

So, for 1st order reflection

1λ = 2 d sin3.4

λ/d = 2 x sin3.4=0.1186

Hence for 2nd order reflection,

2λ = 2d sinӨ

sinӨ = 0.1186

Ө = 6.81

Hence, 2nd order reflection is to be expected at $(6.81)^0$
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