TEST03-solutions - Version 028 TEST03 TSOI (92515) 1 This...

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Unformatted text preview: Version 028 TEST03 TSOI (92515) 1 This print-out should have 11 questions. Multiple-choice questions may continue on the next column or page find all choices before answering. 001 10.0 points A real object is located 20 . 7 cm from a diverg- ing lens of focal length 39 . 3 cm. What is the magnification? 1. 0.575182 2. 0.588336 3. 0.540765 4. 0.627306 5. 0.55626 6. 0.608764 7. 0.5625 8. 0.655 9. 0.616482 10. 0.527597 Correct answer: 0 . 655. Explanation: Let : f =- 39 . 3 cm and p = 20 . 7 cm . 1 p + 1 q = 1 f M = h h =- q p Diverging Lens f < >p > f <q < <M < 1 Using the lens equation, 1 q = 1 f- 1 p = p- f f p q = f p p- f = (- 39 . 3 cm) (20 . 7 cm) 20 . 7 cm- (- 39 . 3 cm) =- 13 . 5585 cm , so M =- q p =-- 13 . 5585 cm 20 . 7 cm = . 655 . 002 10.0 points The smallness of the critical angle c for di- amond means that light is easily trapped within a diamond and eventually emerges from the many cut faces. This makes a dia- mond more brilliant than stones with smaller n and larger c . Traveling inside a diamond, a light ray is incident on the interface between diamond and air. What is the critical angle for total internal reflection? The refraction index for diamond is 2 . 3 . 1. 25.1843 2. 24.0895 3. 21.8234 4. 25.7715 5. 28.4369 6. 22.1702 7. 23.3799 8. 27.4406 9. 23.9854 10. 26.9035 Your answer must be within 0.1% Correct answer: 25 . 7715 . Explanation: For diamond, the critical angle is sin c = 1 n = 1 2 . 3 c = 25 . 7715 . 003 10.0 points Consider a double slit experiment as shown in the sketch. y L d S 1 S 2 viewing screen What is the phase angle difference and corresponding path difference of the 2nd minimum on the screen? 1. = 2 , = Version 028 TEST03 TSOI (92515) 2 2. = , = 2 3. = 4 , = 2 4. = 7 , = 2 5. = 6 , = 6. = 8 , = 3 2 7. = 10 , = 3 2 8. = 9 , = 2 9. = 3 , = 3 2 correct 10. = 5 , = 2 Explanation: r 2 r 1 y L d S 1 S 2 = ta n- 1 y L viewing screen d sin r 2- r 1 P O S 2 Q S 1 90 Q 2 or 360 = 500 nm...
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This note was uploaded on 06/10/2011 for the course PHY 302l taught by Professor Morrison during the Summer '08 term at University of Texas at Austin.

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TEST03-solutions - Version 028 TEST03 TSOI (92515) 1 This...

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