Areflection laue exposure of an aluminium crystal (lattice parameter 0,405 nm) is made using 50 kev radiation. the (111) planes make an angle of 88â° with the incident beam. what order reflections are present in the beam that is diffracted by these planes? ignore diffraction as a result of wavelengths greater than 0,2 nm that will be too weak to observe.

From center station, a train departs every 30 minutes on the fast line and a train departs every 50 minutes on the state line. if two trains depart from center station at 8: 00 a.m., one on each of the two lines, what is the next time that two trains, one on each line, will depart at the same time?

Awater slide of length l has a vertical drop of h. abby's mass is m. an average friction force of magnitude f opposes her motion. she starts down the slide at initial speed vi. use work-energy ideas to develop an expression for her speed at the bottom of the slide. then evaluate your result using unit analysis and limiting case analysis. express your answer in terms of the variables h, m, l, vi, f and appropriate constants. vf v f

What is the role of lenses in microscopy?