{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Practice II Mid Term Spring 2018.pdf

Practice II Mid Term Spring 2018.pdf - Practice II Mid Term...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
Practice II Mid Term Fall 2017 Closed Book MSE 221 II MID TERM (11/13/15) 50 minutes 1. A certain crystal is cut so that rows of atoms on its surface separated by a distance of act like a diffraction grating. A beam of electrons is accelerated through a potential difference of and is incident normally on the surface. (a) Calculate how many possible diffraction order peaks will be observed from the surface and at what angles relative to the incident beam will these be observed? (b) Draw a rough sketch of the intensity distribution you expect from this set-up. ( 5 + 5 + 5 = 15 points ) 2. (a) What does the acronym LASER represent? (b) Give a pictorial representation of the quantum mechanical optical transitions possible between two states of a system with different energies. (c) Give a statement of Heisenberg’s uncertainty principle in words and express it mathematically as it applies to the energy and lifetime of a particle emitted during an atomic transition.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern