Physics
A mirage occurs because of

Reflection by hot ground
Interference of light
Diffraction of light
Total internal reflection by layers of air

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Physics
Plants are dried up in winter due to frost because

There is mechanical loss of tissues and drought condition prevails
Respiration does not take place at low temperature
Evaporation does not take place
Photosynthesis does not take place at such low temperature

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Physics
Rainbows are produced when sunlight :

Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction
None of the given statements is correct.
Incident on rain drops hanging in the atmosphere is dispersed after suffering refraction and internal reflection.
Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.

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