question_answer 42)

  The phenomena involved in the reflection of radiowaves by ionosphere is similar to (a) reflection of light by a plane mirror (b) total internal reflection of light in air during a mirage (c) dispersion of light by water molecules during  the formation of a rainbow (d) scattering of light by the particles of air

Answer:

  (b) The phenomenon involved in the reflection of  radiowaves by ionosphere is similar to total  internal reflection of light in air during a mirage (angle of incidence > critical angle). Choice (b) is correct