{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

08_751_hw01 - Physics 751 Homework#1 Due Friday September 5...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Physics 751 Homework #1 Due Friday September 5, 11:00 am. 1. (a) Suppose the electron in a hydrogen atom is in the circular Bohr orbit with n = 30. How many times per second does it go around? (b) Suppose now the electron drops to the n = 29 state, emitting a single photon. What is the frequency of this photon, in cycles per second? (c) Comment on the relation between your answers in (a), (b) above. What would you guess the relation to be for n = 300? 2. Rutherford established that all the positive charge in an atom was concentrated in a massive central nucleus by analyzing the scattering of α -particles, which are He nuclei. He found that the numbers scattered as a function of angle of deflection were as predicted using a model of a point nucleus with the usual inverse-square repulsion. Would this be true if the α ’s actually hit the nucleus? Find (somewhere) the approximate size of the gold nucleus (he used gold foil) and deduce what minimum energy of the incoming α -particle would be expected to show deviation from the inverse-square law prediction of scattering. Would the minimum energy be different if
Image of page 1
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