Physics - Geometrical Optics Question with Solution | TestHub

The following figure shows the multiple reflections of a light ray along a glass corridor where the walls are either parallel or perpendicular to one another. If the angle of incidence at point$\mathrm{P}$is$30°$, then the angles of reflection of the light ray at points$\mathrm{Q}$,$\mathrm{R}$,$\mathrm{S}$and$\mathrm{T}$respectively are