Question

In experiment with a rectangular glass slab a student observed that a Ray of light incident at an angle of 60 degree with the normal on one face of the slab, after refraction strikes the opposite face of the slab before emerging out in air making an angle of 42 degree with the normal. Draw a labelled diagram to show the part of this ray. What value would you assign to the angle of refraction and angle of emergence?​

Answer 1

Answer:

OA - incident ray i is angle of incidence = 45° Given r2 = 40° r2 and r2 are alternate interior angles, ∴ ∠r1 = ∠r2 = 40° So, angle of refraction = 40° Since, the emergent ray is parallel to the incident ray, the angle of emergent must be equal to angle of incidence,i.e ∠e = ∠ i = 55° 499606/experiment-with-rectangular-glass-slab-student-observed-that-ray-light-incident-angle-55