Class IX

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