Question

27. One of the experiments which laid the foundation for quantum physics was the Davisson Germer (DG) experiment in which a beam of electron was diffracted demonstrating its wave nature. The wavelength of a particle of mass, , with a velocity, v is mv where h e 6.63 X 10 ls. The mass of the electron is 9.1110 g. If DG used a stit separation of 6.92 nm, then what velocity must their electrons have had for the angulan separation (0) between the central fringe and the first bright fringe to be 1"? 28, Repeat question #27 but with a 145 g baseball.

answer 27. 6.03x10to the 6th power
28 answer 3.79 x20 to the -23 power

Answer 1

ven Ya 6620 XI

片 M. 3 -25 3소 2.