Modern Physics

the week of February 16 - 19


this week's readings

    Monday,  Feb 15            extended weekend

    Tuesday, Feb 16            bubble chamber lab;
                                        make sure that you bring with you the solution for
                                        the radius of the circle that subtends an arc,
                                        given the 1) arc length L
                                                and  2) the distance h from the midpoint of the arc
                                                            to the midpoint of the chord connecting
                                                            the arc lengths ends

   Thursday, Feb 18            15 (8-10) on quarks: does it shed any light on
                                                            a) how quarks interact (via color)
                                                            b) what is the evidence for quarks

    Friday, Feb 19               first-ever web-cast class from NCSSM
                                    go here and click on Live Webcam
                                (you must have RealPlayer G2 to see it)
                                            bring the formula for the scattering angle q as
                                            a function of K, b, and Z  to class


this week's assignments

    Tuesday, Feb 16            bubble chamber lab;
                                        make sure that you bring with you the solution for
                                        the radius of the circle that subtends an arc,
                                        given the 1) arc length L
                                                and  2) the distance h from the midpoint of the arc
                                                            to the midpoint of the chord connecting
                                                            the arc lengths ends

    Thursday, Feb 18        1) measured all circle radii on bubble chamber picture
                                       2) found the numerical constant of proportionality between pc and r
                                            with pc in Gev and r in cm or m
                                       3) determined how the deflection angle of alpha particle scattering
                                            depends on K (alpha kinetic energy), b (impact parameter), and
                                            Z (charge on the foil nucleus)
                                            with an explanation of why using Newton's 2nd law
 
                                    barn-and-pole re-do's are due by 5 pm

    Friday, Feb 19            bring the formula for the scattering angle q as
                                            a function of K, b, and Z  to class

                                    due by 5 pm are the energies and the pc's for all the known particles


links of the week

recent discoveries

 In a Major Breakthrough, Danish Physicist Slows the Speed of Light