# Physics#10 - pokharel (yp624) HW10 TSOI (92515) This...

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pokharel (yp624) – HW10 – TSOI – (92515) 1 This print-out should have 16 questions. Multiple-choice questions may continue on the next column or page – fnd all choices beFore answering. 001 (part 1 oF 2) 10.0 points An object is 13 cm From the surFace oF a re±ective spherical Christmas-tree ornament 6 . 38 cm in radius. What is the apparent position oF the image? Correct answer: - 2 . 56146 cm. Explanation: 1 p + 1 q = 1 f = 2 R M = h h = - q p Convex Mirror 0 > f >p> 0 f <q < 0 0 <M < 1 Let : R = 6 . 38 cm and p = 13 cm . p is positive since it is in Front oF the mirror and R is negative since it is behind the mir- ror. A spherical Christmas-tree ornament is a convex mirror, so 1 p + 1 q = - 2 | R | . We are given the object distance, p and | R | . Inserting these values into the mirror equation and solving For q , we fnd: q = - 1 2 R + 1 p = - 1 2 (6 . 38 cm) + 1 (13 cm) = - 2 . 56146 cm . 002 (part 2 oF 2) 10.0 points What is the magnifcation oF the image? Correct answer: 0 . 197035. Explanation: The magnifcation is given by: M = - q p = - - 2 . 56146 cm 13 cm = 0 . 197035 . 003 10.0 points A concave mirror with a radius oF curvature oF 1 . 3 m is illuminated by a candle located on the symmetry axis 3 . 3 m From the mirror. Where is the image oF the candle? Correct answer: 0 . 809434 m. Explanation: 1 p + 1 q = 1 f = 2 R m = h h = - q p Concave Mirror f > 0 >p> f f <q < 0 >m> -∞ f >p> 0 -∞ <q < 0 >m> 1 Let : f = 0 . 65 m and p = 3 . 3 m . ²rom the mirror equation 1 p + 1 q = 1 f = 2 R f = R 2 q = b 1 f - 1 p B 1 = b 1 (0 . 65 m) - 1 (3 . 3 m) B 1 = 0 . 809434 m . 004 10.0 points A concave mirror has a Focal length oF 48 cm. What is the position oF the resulting image iF the image is inverted and 3 times smaller than the object? Correct answer: 64 cm. Explanation:

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pokharel (yp624) – HW10 – TSOI – (92515) 2 1 p + 1 q = 1 f = 2 R m = h h = - q p Concave Mirror f > 0 >p> f f <q < 0 >m> -∞ f >p> 0 -∞ <q < 0 >m> 1 Let : f = 48 cm and n = 3 . Since the image is inverted,
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## This note was uploaded on 03/29/2012 for the course PHYSICS 302L taught by Professor Antanioweitz during the Spring '10 term at University of Texas at Austin.

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Physics#10 - pokharel (yp624) HW10 TSOI (92515) This...

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