Monochromatic X-ray of wavelength 1.4A'are incident on a crystal having 1.5A'as interatomic spacing.find the maximum order in which the diffraction takes place.
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Answer:
According to bragg's Law
nλ=dsinθ
Since layers are consecutive,
∴ taking n=1
λ=(0.2)(sin11.8
o
)
=(0.2)(0.2045)
=0.0409 nm
λ=0.409
A
˚
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