2010-11-Sem2-Test2 - Page 1 of 8 NATIONAL UNIVERSITY OF...

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Page 1 of 8 Page 1 of 8 NATIONAL UNIVERSITY OF SINGAPORE PC1222 FUNDAMENTALS OF PHYSICS II TERM TEST 2 (Semester II: AY 2009-10, 16 April) Time Allowed: 1.5 Hours (2:15 pm – 3:45 pm) INSTRUCTIONS TO CANDIDATES 1. This test paper contains TWENTY-FIVE multiple-choice questions and comprises EIGHT printed pages including the cover page. 2. Answer ALL questions on the Optical Reader Form. 3. For each question, select the correct answer A, B, C, D or E by darkening the appropriate circle on the Optical Reader Form. Darken only ONE circle for each answer; darkening more than one circle will invalidate your answer. 4. All questions carry equal marks; There is NO negative marking. 5. ONLY Optical Reader Form should be submitted at the end of the test. 6. This is a CLOSED book test. You are allowed however to bring in ONE help sheet no larger than A4 in size.
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Page 2 of 8 Page 2 of 8 1. In the figure, Joel is using a device known as a periscope to observe an object, represented by an upright arrow. The periscope contains two plane mirrors tilted at an angle of 45° relative to Joel's line of sight. Which one of the following pairs of characteristics of the final image that Joel looks at is correct relative to those of the object? A) inverted, real B) upright, enlarged C) inverted, smaller D) inverted, same size E) upright, virtual 2. The speed of light in material A is 1.4 times as large as it is in material B. What is the ratio of the refractive indices, n A / n B , of these materials? A) 1.4 B) 1.2 C) 1.0 D) 0.80 E) 0.71 3. Light with a wavelength of 589 nm in a vacuum strikes the surface of an unknown liquid at an angle of 31.2° with respect to the normal to the surface. If the light travels at a speed of 1.97 × 10 8 m/s through the liquid, what is the angle of refraction? A) 19.9° B) 26.1° C) 34.2° D) 39.3° E) 51.9° 4. A fiber optic line is composed of a core with an index of refraction of n 1 = 1.51 and cladding with an index of n 2 = 1.40. A beam of light from the air (n 0 = 1) enters the fiber
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This note was uploaded on 11/30/2011 for the course EEE 1001 taught by Professor Phoon during the Spring '11 term at National University of Singapore.

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2010-11-Sem2-Test2 - Page 1 of 8 NATIONAL UNIVERSITY OF...

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