EXAM1answerkey - PHYSICS 132 — Exam | Monday, September...

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Unformatted text preview: PHYSICS 132 — Exam | Monday, September 24, 2007 '01 - BINGHAMTON UNIVERSITY Department of Physics, Applied Physics and Astronomy PRINT NAME: gfiw 23g, Egg“; f Last Name. First Name LAST 4 DIGITS 88# fl PLEASE CIRCLE YOUR DISCUSSION SECTION TR 10:05 SILEO 02 TR 11:40 SILEO 03 TR 2:50 SILEO 04 TR 6:00 NOCITO 05 MW 2:50 WANG 06 TR 4:25 WANG 07 TR 6:00 WALDMAN 08 TR 7:10 NOCITO 09 TR 7:10 WALDMAN INSTRUCTIONS: 1. Please read the problems carefully and Solve all of them. 2. Please print your name on & pages, and CIRCLE YOUR DISCUSSION SECTION NUMBER ABOVE. For grading, this exam will be separated and pages could get mixed up if your name is not clearly printed on all pages. (DO NOT USE THIS BOX) Answers to each problem should be written on the specific sheet that contains the question. Use both sides of the same sheet for your answers. Show all of your work and reasoning to receive full credit. Be sure your work is clear. Don't make the grader guess what idea you Were trying to express. Cross out all unwanted work, as incorrect statements may cost you points. Be sure to show reasoning in order to receive full credit. This examination is to be taken without the aid of notes, your textbook, or any other individual. Any violations of this condition will be referred to the Academic Honesty Committee. You may have in your possession one 3" x 5” file card with any information you so choose hand written on one side. POSSIBLE USEFUL INFORMATION: 1 — 25 POINTS 1. A 5.0ft girl wishes to see a fill length image of herselfin a plane mirror. The minimum length a mirror must have to enable her to do this is : ' (A) 10 ft. (B) 5 ft. C) 3.5 ft. 5 2.5a. (E) variable, the further the woman stands fiom the mirror, the smaller the required length can be. (2) A hollow lens is made of extremely thin glass as shown. The index of refraction of glass can be ignored. It can be filled with air (n = 1.0), water (it = 1.3), or C82 (n = 1.6). The lens will diverge a beam of parallel light if it is filled with (A) air and immersed in air. (B) air and immersed in water. (C) water and immersed in C82. (D) C82 and immersed in C82. @ C82 and immersed in water. (3) An object is placed 2 f in front of a lens of focal length + f. The image is: (A) real, inverted, magnified. (B) real. erect, same size. @ real, inverted, same size. (D) virtual, inverted, reduced. (E) real, inverted, reduced. (4) A traveling sinusoidal wave is shown below. At what point is the motion 180° out of phase with the motion at point P? . A. D (A) A (B) B (7 ca e: c C (D) D (E) E 5 (5) The displacement of a string is y = ymmsimkm — wt). The positive direction is the . direction in which m increases. The velocity of the wave is: (A) + k/w. (6) Two small identical speakers are connected to the same source and therefore are in phase with each other. The speakers are 3m apart and at ear level. An observer stands 4m directly in front of one of the speakers as shown. The amplitude of the sound produced by each speaker is the same. The sound heard by the observer will be LEAST . intense if the wavelength is: (A) 1m. F73 @2771. 1‘ (g) . ' 3» W ) m. (E) 5m. ’5' <7 " I ‘l’ 4r. l (7) A piano wire has a mass M and length L. If its fimdamental frequency is f, its tension 1s: 7 (A) 2L f / M . (B) 4M L f . (C) 2M 1‘2 / L. (D) 4f2L2/M- (1;) 4.13M f2. (8) In Young's double slit experiment, the center of a bright fringe occurs whenever the distance traveled from each slit difiers by a multiple or: (A) A/d CB) V2 (C) 3A/4 @A (E) none of the above. r. (9) In Young's double slit experiment, the separation of the distance between the slits is doubled. This results in: (A) an increase in fringe intensity. (B) an decrease in fringe intensity. (C) a halving of the wavelength. ® a halving of the fringe separation. (E) a doubling of the fringe separation. (10) Two stars that are close together are photographed through a telescope. The film used is equally sensitive to all colors. Which situation would result in the most clearly separated images of the two stars? (A) Small lens, red stars. (B) Small lens, blue stars. (C Large lens, red stars. é Large lens, blue stars. (E) Large lens, one star red and the other blue. LAST NAME, FIRST NAIVIB (2) (25 Points) In this problem f is defined to be a distance. Two lenses are separated by a distance 3 f. The first lens is diverging and has a focal length —~ ff The second lens is converging with a fecal length of + f. An pencil with a height 100m. is located a distance 2 f in front of the first lens. Determine all of the following: (A) Theloeation of the final image produced by the two lens system. (B) The height of the final image. (C) T he character ofthe final image; (real or virtual), (erect or inverted); with an explanation of your answers. L 'l t A. 34 4 low“ t ., ,. w ~ ‘- ’ w h ‘ ‘1’ ‘ 5.. 't‘WM‘Zfi 32* Q9 L Le??? L + ‘2: i... 5.x g :5! 5” “F: “F? r: “E Meir? :: as! ‘b 5, jg (“’1 ml at a J '51 L; 52; ": “— ""'” 1:? 5’, a- "a? . it: 3* «.9 (- 1' If! ,.. h 2*, p L , w '0‘ ?> 1 m _ :2; W e :5; v? Ll, - LO ELM " 3 11%: “f (rt/{g t:— ow was / £5 “23’ngth .64“?th ggr‘r‘ 52, r g? + 3' Ag: ‘ a ‘3 M a”; éw + f / l, ‘ L w :2 H L” .5 w t“ 5g 1 4a: a , a *1 £3 “'3’ 5a. 2 m: H e .e. a." z. m amiss: . :5 - ~« m ::; - —— ‘s‘ avg? / {~665th fixara a": “fife/c“. \ €ng xiii/7’ 1(7ae-é: :23 algae, .5 1’ mp» ‘ i 5 _ “"4; 7' a ‘— LE‘G‘ ZGME Prime Lem/E) {3* «7&- ?E A “.7 .311?“ '“ ' v’f Gm 45 Mm“ ‘ ”9 oeec‘vét UL (“fies/(fix, CLfiETr-af‘xf (S w LAST NAME, FIRST NAME (3) (25 Points) A tube of length L is closed at one end. A variable frequency tuning fork is pieced above the tube. As the frequency of the tuning fork is raised from zero, a resonance is detected. The velocity of sound in air is ’Um'r. (A) Determine the frequency of the tuning fork at this first resonance; Draw the standing wave pattern of the displacement of the air molecules at this first resonance. (B) The frequency of the tuning fork is changed until a second resonance is detected. Determine the frequency of the tuning fork at this second resonance. Draw the standing wave pattern of the displacement of the air molecules at this second resonance. (C) The closed end of the tube is removed so it is now open at both ends. The tube still has a length L. Determine the frequency of the tuning fork at the first resonance and draw the standing wave pattern of the displacement of the air molecules at this resonance. (/45 3, - {if ‘ “dd-mm z >‘ "' Le “x: 5 I LAST NAME, FIRST NANIB (4) (25 Points) Light of wavelength /\ is incident coming from air (rim-1. : 1) onto a film with refractive index nfflm m 1.50. This thin film is placed onto a piece of glass (ngzass = 1.25). Determine all of the following: (A) The smallest thickness of the film which will produce a minimum for the light reflected from the film back into air. (B) The smallest thickness of the film that will produce a maximum for the light transmitted from the film into the glass. Ami: Fit L. M (r M 5 .5 ms: W Fat: A «that? fiat/22’ {whim—£57 75‘“ W'flffit” erate w ‘z: e 4—m ‘9" 5)., flrC-vfz’ M{ r: f :3 I: E» A X > 9., j c: i _ I’m/z" Lemmy 6;) “’0 FIT??? 5M“? . Pbfi TRArrsMrFfEa acct/me rig"? ‘ Mm»? {if x a. f a?! ,s {3: , zap/W9‘ if {(6 (9(545'57 fififfifw H /\ {Ami A: fjfléX/r/fw/f PL - 55)! 3: 1%” L 4a., (it err _ 3' “it” «~— -- O a: z; A W TIT W 2:,” ...
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This note was uploaded on 10/12/2009 for the course PHYS 132 taught by Professor Pompi during the Fall '08 term at Binghamton University.

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EXAM1answerkey - PHYSICS 132 — Exam | Monday, September...

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