Question

x rays with wavelength of 2.0nm scatter from a nacl crystal with plane spacing 0.281 nm find the scattering

Answer 1

Step-by-step explanation:

It is given that,

Wavelength of x-rays = 2 nm

Plane spacing, d = 0.281 nm

It is assumed to find the scattering angle for second order maxima.

For 2nd order, Bragg's law is given by :

`2d\sin\theta=n\lambda`

For second order, n = 2

`\sin\theta=(n\lambda)/(2d)\\\\\sin\theta=(2* 2\ nm)/(2* 0.28\ nm)\\\\\theta=\sin^(-1)(7.14)`

Here, θ is not defined. Also, the wavelength of x-rays is more than the plane spacing. It means that it cannot produce any diffraction maximum.