Physics 1 Problem Solutions 282

Physics 1 Problem Solutions 282 - Chapt. 37 Diffraction...

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Unformatted text preview: Chapt. 37 Diffraction Multiple-Choice Problems 037 qmult 00100 1 1 2 easy memory: diffraction defined 1. Diffraction and interference are essentially the same physical phenomenon. It is customary though to use the term diffraction when there are: a) b) c) d) e) few sources. many sources or even a continuum of them. no sources. 2 sources. different sources. 037 qmult 00200 1 4 2 easy deducto-memory: shadows 2. “Let’s play Jeopardy! For $100, the answer is: A large region of strong (but not necessarily complete) destructive interference.” a) b) c) d) e) What What What What What is is is is is a substance, Alex? a shadow, Alex? a dark fringe of a two-slit interference pattern, Alex? the path of the Huns, Alex? the Shadow, Alex? 037 qmult 00300 1 1 1 easy memory: one-slit pattern 3. The one-slit diffraction pattern has: a) b) c) d) e) a broad, bright central fringe. a broad, dark central fringe. three broad bright central fringes. a narrow, dim central fringe. a broad, shaggy central fringe. 037 qmult 00400 1 1 4 easy memory: one-slit zeros 4. The formula for the zeros of a one-slit diffraction pattern (for a slit of width a) is probably most easily remembered (maybe because it so similar to the two-slit maxima formula) in the form: a) b) c) d) e) a sin θ = n. a cos θ = nλ. a2 sin θ = nλ. a sin θ = nλ. sin θ = n. 037 qmult 00500 1 1 1 easy memory: enveloping patterns 5. The two-slit interference pattern (slit center separation d) will be enveloped by the one-slit diffraction patterns of its two slits (widths a) if a) a << d. ...
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