1. The problem statement, all variables and given/known data A cubic crystal has a spacing between atoms of d = 0.2 nm. What is the minimum energy for X-rays such that non-trivial Bragg reflection may occur (peak with n =1)? Write your answer in units of keV. 2. Relevant equations 2dsinθ = nλ 3. The attempt at a solution i have no idea what im doing. i dont remember the instructor talking about this nor can i find lecture notes on bragg reflection. the only reason i know the "relevant equation" is because of a class i took semester where we did an experiment to show bragg reflection. any advice would be appreciated. the second question is similar to this one.