Physics: Ray Optics and Optical Instruments
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Questions and Answers

What is the principle of reversibility of light?

  • Light changes its speed based on the direction of travel
  • Light bends in the opposite direction of travel
  • Light stops when its direction of travel is reversed
  • Light follows the same path regardless of direction of travel (correct)

    • What is the critical angle?

  • Angle of incidence equal to 90 degrees (correct)
  • Angle at which light changes color
  • Angle of refraction equal to 90 degrees
  • Angle that changes light's speed

    • In total internal reflection, the light ray moves from...

  • A more dense medium to a less dense medium (correct)
  • A less dense medium to a more dense medium
  • Two equally dense mediums
  • A medium with no density

    • What must be true about the angle of incidence for total internal reflection to occur?

    <p>It must be greater than the critical angle</p> Signup and view all the answers

    What is a lens?

    <p>A transparent substance bound by two curved surfaces</p> Signup and view all the answers

    What is the working principle of a mirror?

    <p>Reflection of light</p> Signup and view all the answers

    What does the lens formula relate to?

    <p>Power and focal length of a lens</p> Signup and view all the answers

    What does the lens maker formula calculate?

    <p>Focal length of a lens</p> Signup and view all the answers

    According to the principle of reversibility, what happens if the direction of travel of light is reversed?

    <p>Light will follow the same path as before.</p> Signup and view all the answers

    What should be true about the angle of incidence for total internal reflection?

    <p>It should be greater than the critical angle.</p> Signup and view all the answers

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