1) The mass of a bottom quark is 4.20Gev/c^2 and was found by colliding a beam of protons with a cloud of stationary protons.
a) What was the energy of the proton beam?
b) How fast were they moving?
(Hint: The problem is relativistic. Use the center of mass frame.) mp=938.2 Mev/c^2
2) During an experiment you determine the cat off wavelength of a cathod ray tube to be λ0. You repeat the experiment using light with a wavelength of 1/2 λ0.
What are the stopping voltage(potential) and electron velocity in terms of λ0 for second experiment?
3) What are the first 4 wavelength of hte following series for the hydrogen atom?
Lyman
Balmer
Paschen