Physics
Rainbows are produced when sunlight :

Incident on raindrops hanging in the atmosphere is dispresed after suffering reflection.
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.

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Physics
Energy in reflected light :

Does not depends on the angle of incidence
Decreases with the increase in angle of incidence
Becomes maximum for angle of incidence equal to 45°
Increases with the increase in angle

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