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The first - order diffraction os X- rays...

The first `-` order diffraction os `X-` rays from a certain set of crystal planes occurs an angle of `11.8^(@)` from the planes. If the planes are `0.281 nm` apart, what is the wavelength of `X-` rays?

A

0.1124nm

B

1.124nm

C

0.0578nm

D

0.578nm

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