‘Which of the following phenomena are reverse of each other ? 

Correct answer is (A) Only R and S

Ray optics or geometrical optics : Ray optics can be used for understanding phenomena like reflection, refraction, double refraction, total internal reflection, etc.

Commonly observed phenomena concerning light can be broadly split into three categories: 1. Ray optics or geometrical optics: Ray optics can be used for understanding phenomena like reflection, refraction, double refraction,...

B) refraction, dispersion and total internal reflection

i when lenses are kept in contact then 1/f = 1/f1 + 1/f2 f = f1f2 / f1 + f2 ii. When kept distant apart, 1/f = 1/f1 +1/f2 - d/f1f2

C) Lightning between two clouds

The periodic trends are explained in the terms of two fundamental factors, namely, attraction of extranuclear electrons towards the nucleus and repulsion between electrons belonging to the same atom. These attractive...

Correct option is A) Boiling