Light (Chapter 5)

    Cards (4)

    • Properties of light
      -Light is a form of energy.
      -Light always travels along a straight line.
      -Light travels at a speed of 3 x 10^8m/s in a vacuum
      -Light can be reflected/refracted
    • Reflection of light
      -Bounces off light rays of a surface
      -Laws of reflection of light
      ~Incident ray, reflected ray and normal must lie on the same plane
      ~Angle of incidence=Angle of reflection
    • Characteristics of image formed in a plane mirror
      1. Virtual
      2. Same size as object
      3. Laterally inverted
      4. Upright
      5. Same distance as the object from the mirror
    • Refraction
      -Refraction is the change in direction of the light ray passing from one medium to another caused by its change in speed
      -Laws of refraction
      ~Incident ray, reflected ray and normal must lie on the same plane
      ~Sin i/Sin r = Formula of refractive index
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