Concept:Optical effects are matched with their underlying physical phenomena.
Explanation:Aurora Borealis is caused by emission of radiation from oxygen and nitrogen atoms excited by charged particles.
Thus, (P) matches with (5).
Partially polarized sunlight results from scattering of light by molecules in the atmosphere.
Thus, (Q) matches with (4).
Rainbow formation involves dispersion (splitting of white light into colors) and reflection inside water drops.
Thus, (R) matches with (1).
Dark and bright fringes arise due to diffraction of light.
Thus, (S) matches with (3).
The complete mapping is: P→5, Q→4, R→1, S→3.
Answer:Option (A).
