The phenomena involves in the reflection of radiowaves by ionosphere is similar to

reflection of light by a plane mirror.

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total internal reflection of light in air during a mirage.

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dispersion of light by water molecules during the formation of a rainbow.

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scattering of light by the particles of air.

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Solution

The correct option is B total internal reflection of light in air during a mirage.
The ionosphere is the ionized layer of the Earth's atmosphere and its consists of the ions which are formed due to the UV rays coming from the sun. These free electrons result in the reflection of the radio waves and make them reflected back.

This is same as the mirage formation due to the total internal reflection of the rays when the incident angle is greater than the critical angle.

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Similar questions

Q. Question 5
Which of the following phenomena of light are involved in the formation of a rainbow?

(a) Reflection, refraction and dispersion
(b) Refraction, dispersion and total internal reflection
(c) Refraction, dispersion and internal reflection
(d) Dispersion, scattering and total internal reflection

Q. Assertion :The rainbow is an example of the dispersion of sunlight by the water drops in the atmosphere. Reason: No reflection or refraction of light is involved in the formation of rainbow.

Q. The area illuminated during diffused reflection is _______ regular reflection by a plane surface. Assume parallel beam of incident light is used.

Q. If total internal reflection takes place only when light ray moves from optical denser to optical rarer...
But during rainbow formation total internal reflection takes place when light enters from air to a water drop that is from rarer medium to denser medium which is the exact converse...
what is it happening this way.?

Question 6
Twinkling of stars is due to atmospheric

(a) dispersion of light by water droplets
(b) refraction of light by different layers of varying refractive indices
(c) scattering of light by dust particles
(d) internal reflection of light by clouds

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