A light ray traveling in glass medium is incident on glass-air interface at an angle of incidence θ. The reflected ( R ) and transmitted ( T ) intensities, both as function of θ, are plotted. The correct sketch is
(A)(see structure)
(B)(see structure)
(C)(see structure)✓ Correct
(D)(see structure)
Answer: (C)
Solution
At the glass-air interface, as the angle of incidence increases, the reflected intensity increases while the transmitted intensity decreases. Beyond the critical angle, total internal reflection occurs — all light is reflected and none is transmitted. Option (C) correctly shows R increasing to 100% at the critical angle while T drops to zero at that point.
JEE Advanced · 2011 · 10 Apr 2011 · Paper 2 · Single correct option
