Class VIII

Materials which allow some light to pass through them are called
  1. transparent
  2. translucent
  3. opaque
  4. semi-absorbent
Line which is at right angle to surface is called
  1. normal ray
  2. incident ray
  3. reflected ray
  4. all of them
Cyan, yellow and magenta are
  1. primary colors
  2. white colors
  3. tertiary colors
  4. secondary colors
Reflection obtained from a smooth surface is called a
  1. regular reflection
  2. irregular reflection
  3. both a and b
  4. none
Light travelling in a straight line strikes another surface and
  1. bounces off
  2. pass through
  3. absorbed
  4. adsorbed
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