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For a cyrstal, the angle of diffraction ...

For a cyrstal, the angle of diffraction `(2 theta)` is `90(@)` and the second order line has a d value of 2.28Å. The wavelength (inÅ) of X-rays used for Bragg's diffraction is

A

1.612

B

2

C

2.88

D

4

Text Solution

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(a) Given, angle of diffraction `(2 theta)=90^(@)` `theta=45^(@)`
Distance between two planes, d=2.28Å
n=2 "["therefore second order diffraction "]"
Bragg's equation is `nlambda=2d sin theta`
`2xxlamda=2xx2.28xxsin45^(@) Rightarrow lamda=1.612`
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