Question

X rays of wavelength 0.45 nm are scattered from free electrons in a target.

Answer 1

use energy equation here

Answer 2

As per the question scattered angle is required , if its given Use the formula:

Final wavelength - initial wavelength = h/{(m*c)*(1-cosФ).

to find Final wavelength :

Initial wavelength is given as 0.45 nm.

h=6.626*(10)^-34 Js.

m= mass of electron i.e 9.11*(10)^-31 kg

c= 3*(10)^8 m/s. speed of light.