Question

complete the path of the light ray incident on a rectangular glass block and mark (a) angle of incidence i,(b) angle of refraction
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Answer 1

Answer:

(a) The complete path of incident ray in glass block is drawn in figure below.

(b) Angle of incidence (i) and angle of refraction (r) are marked in part (a). Refractive index (μ) of glass is related to the angles as

sinr

sini

=μ

(c) Angle of emergence (e) is marked in part (a). The two angles are related to each other by the relation ∠i=∠e

(d) Incident ray and emergent ray are parallel to each other.

(e) Lateral displacement is indicated in the figure by XY.