Quiz: Light And Reflection (sph3up)

12 Questions
Light And Reflection Quizzes & Trivia

Sample quiz for optics unit

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Questions and Answers
  • 1. 
    Calculate the index of refraction for an object in which light travels at 1.97 x 108 m/s.
    • A. 

      1.52 x 108 m/s

    • B. 

      0.66 m/s

    • C. 

      1.52 m/s

    • D. 

      1.95

    • E. 

      1.52

  • 2. 
    A light ray has an angle of incidence of 34º. The reflected ray will make what angle with the reflecting surface?
    • A. 

    • B. 

      34º

    • C. 

      56º

    • D. 

      66º

    • E. 

      74º

  • 3. 
    A YAG laser has a frequency of 2.8 ´ 1014 Hz. What is the wavelength of the light it produces?
    • A. 

      1.2 x 10–23 m

    • B. 

      1.1 x 10–6 m

    • C. 

      1.2 x 10–2 m

    • D. 

      9.4 x 105 m

    • E. 

      8.5 x 10–22 m

  • 4. 
    An student is located 1.8 m from a plane mirror. How far is the image from the student?
    • A. 

      0 m

    • B. 

      0.9 m

    • C. 

      1.8 m

    • D. 

      2.7 m

    • E. 

      3.6 m

  • 5. 
    The image in a plane mirror is
    • A. 

      Upright and virtual

    • B. 

      Laterally inverted and virtual

    • C. 

      Inverted and virtual

    • D. 

      Two of A, B, and C

    • E. 

      All of A, B, and C

  • 6. 
    An object is placed between F and C of a concave mirror.  The image will be located:
    • A. 

      Beyond C

    • B. 

      Between F and C

    • C. 

      Between F and the vertex

    • D. 

      Behind the mirror

    • E. 

      Not enough information provided

  • 7. 
    An object is located at the focal point for a convex mirror.  The image produced will be
    • A. 

      Inverted and real

    • B. 

      Upright and real

    • C. 

      Inverted and virtual

    • D. 

      Upright and virtual

    • E. 

      No image will be produced

  • 8. 
    Objects placed between F and the vertex of a concave mirror will produce images that are:
    • A. 

      Larger than the object

    • B. 

      Virtual

    • C. 

      Upright

    • D. 

      Two of A, B and C

    • E. 

      All of A, B and C

  • 9. 
    Sometimes rays of light approaching curved mirrors do not all meet at the focal point.  This is due to a phenomenon known as:
    • A. 

      Refraction

    • B. 

      Chromatic abberation

    • C. 

      Spherical abberation

    • D. 

      Dispersion

    • E. 

      Diffraction

  • 10. 
    To properly use a shaving mirror (vanity mirror) your face must be located:
    • A. 

      On the focal point

    • B. 

      Between the focal point and the mirror

    • C. 

      On the centre of curvature

    • D. 

      Beyond the centre of curvature

    • E. 

      Between the centre of curvature and the focal point

  • 11. 
    When driving at night, headlights of cars viewed in the rearview mirror can be a distraction for the driver.  This helps reduce the amount of light entering your eyes because
    • A. 

      Only a small percentage of light is reflected off the glass surface

    • B. 

      Only a small percentage of light is reflected off the silvered surface

    • C. 

      The light reflecting off the glass is sent away from the driver's eyes

    • D. 

      The light entering the eyes are of a different colour

    • E. 

      Light entering the glass is absorbed by the glass to make it dimmer

  • 12. 
    A convex mirror of focal length 10 cm is used to create an image of a duck one-third its original height.  The duck must be located:
    • A. 

      5 cm from the mirror

    • B. 

      10 cm from the mirror

    • C. 

      15 cm from the mirror

    • D. 

      20 cm from the mirror

    • E. 

      30 cm from the mirror