1147_Physics ProblemsTechnical Physics

1147_Physics ProblemsTechnical Physics - 488 Introduction...

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488 Introduction to Quantum Physics P40.67 From the uncertainty principle ∆∆ Et = 2 or mc t 2 2 ej = = . Therefore, m m h ct m h tE R == 4 4 2 π af m m = ×⋅ × × F H G I K J 6626 10 135 1 281 10 34 17 13 8 . . Js 48 . 7 01 0 s M e V MeV 1.60 10 J . P40.68 λθ λ =− = ′ − h mc e 1 0 cos ′= = + =+− L N M O Q P =+ L N M O Q P + L N M O Q P L N M O Q P −− E hc hc hc h E hc hc E hc hc E E e e ee λλ θ θθ 0 0 1 0 2 0 1 0 2 0 1 0 0 2 1 1 11 1 1 cos cos cos cos P40.69 (a) The light is unpolarized. It contains both horizontal and vertical field oscillations. (b) The interference pattern appears, but with diminished overall intensity. (c) The results are the same in each case. (d) The interference pattern appears and disappears as the polarizer turns, with alternately increasing and decreasing contrast between the bright and dark fringes. The intensity on the screen is precisely zero at the center of a dark fringe four times in each revolution, when the
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