Consider the path of a ray of light passing through a rectangular glas

1.	Consider the path of a ray of light passing through a rectangular glass slab for different angles of incidence. (i) Which one is greater: angle of incidence or angle of refraction? (ii) What happens to the emergent angle on increasing the incident angle at air-glass interface? (iii) State the conditions when no bending occurs.
Answer» (i) ∠i = ∠e. (ii) Angle of emergence also increases. (iii) The light ray falls along the normal or the refractive index of the two optical media are equal.

Consider the path of a ray of light passing through a rectangular glass slab for different angles of incidence. (i) Which one is greater: angle of incidence or angle of refraction? (ii) What happens to the emergent angle on increasing the incident angle at air-glass interface? (iii) State the conditions when no bending occurs.

Answer»

(i) ∠i = ∠e.

(ii) Angle of emergence also increases.

(iii) The light ray falls along the normal or the refractive index of the two optical media are equal.

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