2009-10-Sem1-Test2

# 2009-10-Sem1-Test2 - NATIONAL UNIVERSITY OF SINGAPORE...

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Unformatted text preview: NATIONAL UNIVERSITY OF SINGAPORE PC1222 FUNDAMENTALS OF PHYSICS II TEST 2 (Semester I: AY 2009-10, 9 November 2009) Time Allowed: 1.5 Hours 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, or D 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; marks will be deducted for wrong answers. 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 in double sides no larger than A4 in size. Page 2 of 8 1. Topic: Spherical Mirror Difficulty: Level 1 An object is placed 15cm from a concave mirror of focal length 20cm. The object is 4 . 0 cm tall. Where is the image located? (A) 12cm behind the mirror (B) 12cm in front of the mirror (C) 60cm behind the mirror (D) 60cm in front of the mirror 2. Topic: Spherical Mirror Difficulty: Level 2 An object is 8 . 90 cm tall. The image is 7 . 80 cm tall and 14 . 8 cm from a convex mirror. What is the mirror’s focal length? (A)- 13 . 0 cm (B)- 16 . 9 cm (C)- 105 cm (D)- 120 cm 3. Topic: Refraction of Light Difficulty: Level 2 Light of wavelength 500nm travelling with a speed 2 . × 10 8 m / s in a certain medium enters another medium of index of refraction 5 / 4 times that of the first medium. What are the wavelength and speed in the second medium? Wavelength (nm) Speed (m/s) (A) 400 1 . 6 × 10 8 (B) 400 2 . 5 × 10 8 (C) 625 2 . 5 × 10 8 (D) 625 1 . 6 × 10 8 4. Topic: Refraction of Light Difficulty: Level 2 A small underwater pool light is 1m below the surface of a swimming pool. What is the radius of the circle of light on the surface from which light emerges from the water? [Index of refraction for water n w = 1 . 333] (A) 0 . 57 m (B) 0 . 77 m (C) 1 . 13 m (D) 1 . 43 m PC1222 Fundamentals of Physics II Semester I, 2009/10 Page 3 of 8 5. Topic: Dispersion of Light Difficulty: Level 1 A certain kind of glass has n blue = 1 . 650 for blue light and n red = 1 . 610 for red light. If a beam of white light (containing all colours) is incident at an angle of 30 ....
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2009-10-Sem1-Test2 - NATIONAL UNIVERSITY OF SINGAPORE...

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