What will be the wavelength of the X-rays which give a diffraction angle `2theta` equal to `16.80^(@)` for a crystal ? The interplanar distance in the crystal is `0.200` nm and only the diffraction of the first order is absorbed.

What will be the wavelength of the X-rays which give a diffraction ang

1.	What will be the wavelength of the X-rays which give a diffraction angle `2theta` equal to `16.80^(@)` for a crystal ? The interplanar distance in the crystal is `0.200` nm and only the diffraction of the first order is absorbed.
Answer» According to Bragg equation, `nlambda=2dsinthetaor lambda=(2dsintheta)/(n)` `2theta=16.80^(@)and theta=8.40^(@),n=1` (First order diffraction) `d=0.2nm=0.2xx10^(-9)m` `lambda=(2xx(0.2xx10^(-9))xx(sin8.4^(@)))/(1)` `=(2xx(2xx10^(-10)m)xx(0.146^(@)))/(1)=0.0584xx10^(-9)m=0.0584nm`

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What will be the wavelength of the X-rays which give a diffraction angle `2theta` equal to `16.80^(@)` for a crystal ? The interplanar distance in the crystal is `0.200` nm and only the diffraction of the first order is absorbed.

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