Class IX

A street lamp is example of
  1. extended light source
  2. point source light
  3. both a and b
  4. none
Bouncing off or returning of light after striking a surface is called
  1. reflection
  2. refraction
  3. transmission
  4. mirror
A mirror which have reflected surface bugles outwards is called a
  1. convex mirror
  2. concave mirror
  3. plane mirror
  4. cosmetic mirror
Fluid which reflects all colors of white light is
  1. water
  2. milk
  3. orange juice
  4. vinegar
Mirrors which have curved surfaces are
  1. concave
  2. convex
  3. both a and b
  4. plane
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