a. In the figure below AO is a ray of light incident on a rectangular glass slab.
А
i) Copy the diagram and complete the path of the ray of light through the glass slab.
ii) In the diagram, mark the angle of incidence (i) and the angle of refraction(r) at the first
interface .How the refractive index of the glass related to the angles i and r?
b. i) Define Critical angle.
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Step-by-step explanation:
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
sinrsini=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.
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