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Exam 3 Standard format: 1 hour

Exam 3 Standard format: 1 hour. Mirror summary:. CONCAVE. CONVEX. So …. So …. Image. Object. Image virtual, upright: d i < 0. d o > f. real, inverted. virtual, upright. For any d o. d o < f. THIN LENS EQUATIONS: . converging. diverging.

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Exam 3 Standard format: 1 hour

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  1. Exam 3 Standard format: 1 hour

  2. Mirror summary: CONCAVE CONVEX So … So … Image Object Image virtual, upright: di < 0 do > f real, inverted virtual, upright For any do do < f

  3. THIN LENS EQUATIONS: converging diverging

  4. 1) A laser beam strikes a plane's reflecting surface with an angle of incidence of 52°. What is the angle between the incident ray and the reflected ray? A) 52° B) 105° C) 45° D) 90° Diff: 1 Page Ref: Sec. 23.2

  5. 2) A spherical concave mirror has a radius of curvature of 20 cm. How far from the mirror is the focal point located? A) 10 cm B) 20 cm C) 30 cm D) 40 cm Diff: 1 Page Ref: Sec. 23.3

  6. 3) A object is 12 cm in front of a concave mirror, and the image is 3.0 cm in front of the mirror. What is the focal length of the mirror? A) 15 cm B) 4.0 cm C) 2.4 cm D) 1.3 cm Diff: 1 Page Ref: Sec. 23.3

  7. 4) A convex spherical mirror has a focal length of -20 cm. An object is placed 10 cm in front of the mirror on the mirror's axis. Where is the image located? A) 20 cm behind the mirror B) 20 cm in front of the mirror C) 6.7 cm behind the mirror D) 6.7 cm in front of the mirror Diff: 1 Page Ref: Sec. 23.3

  8. 5) A light ray in air is incident on an air to glass interface at an angle of 45° and is refracted at an angle of 30° to the normal. What is the index of refraction of the glass? A) 1.23 B) 1.31 C) 1.41 D) 1.74 Diff: 1 Page Ref: Sec. 23.5

  9. 6) A substance has an index of refraction of 1.46. Light is passing through it at 53.0°. At what angle will it leave into the air? A) It will not leave. B) 59.1° C) 43.2° D) 33.2° Diff: 1 Page Ref: Sec. 23.6

  10. 7) A 14-mm tall object is 4.0 mm from a converging lens. If the image is 4.0 mm tall, how far is it from the lens? A) 14 mm B) 8.7 mm C) 1.4 mm D) 1.1 mm Diff: 1 Page Ref: Sec. 23.7-23.

  11. 8) An object is 15 mm in front of a converging lens, and the image is 4.0 mm behind the lens. What is the focal length of the lens? A) 11 mm B) 5.5 mm C) 3.8 mm D) 3.2 mm Diff: 1 Page Ref: Sec. 23.7-23.8

  12. 9) A diffraction grating has 5000 lines per cm. The angle between the central maximum and the fourth order maximum is 47.2°. What is the wavelength of the light? A) 138 nm B) 183 nm C) 367 nm D) 637 nm Diff: 2 Page Ref: Sec. 24.6-24.7

  13. 10) 350 nm light falls on a single slit of width 0.20 mm. What is the angular width of the central diffraction peak? A) 0.10⁰ B) 0.15⁰ C) 0.20⁰ D) 0.30⁰ Diff: 2 Page Ref: Sec. 24.5

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