a) Describe in less than 300 words ONE type of apparatus (usinga diagram if it helps) that is used to collect diffractioninformation using X-rays. Include in your answer why this set up isused to successfully get diffraction from crystals?
b) Describe in less than 300 words how the equilibriumone-dimensional band diagram of a pn junction (under zero bias)evolves based on diffusion and drift currents that occur due to thediffering impurities in the p and n sides.
Write it clear please.
