An unpolarised light beam strikes a glass surface at Brewster’s angle. Then:

Question

G1 Physics · Accepted Answer

Step 1: At Brewster angle tan i_B = n₂/n₁ for nonmagnetic media. Step 2: The reflected and refracted rays become perpendicular. Step 3: The reflected beam is plane polarised (p component has zero reflection); transmitted light generally retains a mixture and is only partially polarised. Final answer: (C).