PHYS-115(3) (Kaldon-16406) Name ______________________________________WMU - Winter 2001Exam 3 - 100,000 points Book Title __________________________________________Section: 3a 3b 3c 3d A to F G to M N to S T to Z 03/28/2001•Rev.4State Any Assumptions You Need To Make -- Show All Work -- Circle Any Final AnswersUse Your Time Wisely - Work on What You Can - Be Sure to Write Down EquationsBOLDFACE Variables Are Vectors - Feel Free to Ask Any QuestionsTrack 7 • Any Colour You Like PINK FLOYD—THE DARK SIDE OF THE MOON (50,000 points)1.) (a) For a particular kind of glass, n2 = 1.55. If light came in from the air side, n1 = 1.00, at an angle q1 =45°, then find the angle q2.(b) If you could see the Pink Floyd The Dark Side of the Moon CD cover in color, the white ray at the left splitsin colored rays (ROYGBIV) with red at the top and violet at the bottom. This is due to the phenomena calleddispersion. If the index of refraction for red light is nred = 1.5500 and violet light is it nviolet = 1.5656, explainwhether the order of colors as shown on the CD cover is correct or inverted.(c) Given the information in (a) and (b), briefly explain whether the picture on the CD cover is accurate orflawed. You may wish to do a couple of calculations to prove your point. Do not write long paragraphs – makeshort comments that are easy to read. Use the Worksheet on Page 5 if you need more room.Physics 115 / Exam 3 Winter 2001 Page 2(d) Before there were Compact Disc players, we had things called “albums” and “LP records”. People I knew inthe dorm at Northwestern University would play The Dark Side of the Moon on their huge speakers at 300 W.With the speakers blasting that loud, find the current in the speaker wire at 12.0 V.A.C. and find how muchcurrent that represents coming from the 120. V.A.C. electrical outlet.(e) With the primary side of a transformer at 120. V.A.C. and the secondary side at 12.0 V.A.C., find thenumber of windings on the primary side if there are 100. windings on the secondary side.Time to Get Serious About Starship and Keanu Reeves? (50,000 points)2.) Sirius – the Dog Star – is 8.60 light years from Earth. (a) How many meters is this?Sir·i·us (sĭr¹ē-əs) nounA star in the constellation Canis Major, thebrightest star in the sky, approximately 8.6light-years distant from Earth. Also calledDog Star, Sothis.[Latin Sīrius, from Greek Seirios, fromseirios, burning.]Dogstar / Happy EndingPhysics 115 / Exam 3 Winter 2001 Page 3(b) The Jefferson Starship is heading to Sirius at a speed of 0.860 that of light. How many years will they thinkthe trip takes?(c) Show that Music Impresario Dick Clark sees the same amount of time pass on the Earth whether you use thedistance as seen from Earth or convert the time as seen on the Jefferson Starship.Jefferson Airplane / Freedom at Point Zero . . . .Physics 115 / Exam 3 Winter 2001 Page 4(d) The light from Sirius shines on a lens with a focal length f = 10,000. mm = 10.0 m. Although the star ishuge, it is very far away and so the in-focus image will still be that of a point. Where is the image, q, of Siriuslocated? If you did not get an answer to (a), use p = ¥ .(e) This lens contains an anti-reflection coating ( ncoating = 1.38 ) on glass ( nglass = 1.55 ) in air (nair = 1.00 ). Ifthe coating is 200. nm thick, for what wavelength of light is this an anti-reflection coating in