In an experiment to trace the path of a ray of light passing through a rectangular glass slab, four students measured the angles of incidence (i), angles of refraction (r) and angles of emergence (e) as shown in the diagrams:

The correct measurement is given in the diagram:
(1) A
(2) B
(3) C
(4) D

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Solution

The angle of incidence is taken as the angle between the incident ray and the normal, the angle of refraction is taken as the angle between the refracted ray and normal, and the angle of emergence is taken as the angle between the emergent ray and the normal to the slab. According to this, we can say that the correct representation is given by student C.

Hence, the correct answer is option 3.

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In an experiment to trace the path of a ray of light passing through a rectangular glass slab, four students measured the angles of incidence (i), angles of refraction (r) and angles of emergence (e) as shown in the diagrams: The correct measurement is given in the diagram: (1) A (2) B (3) C (4) D

In an experiment to trace the path of a ray of light passing through a rectangular glass slab, four students measured the angles of incidence (i), angles of refraction (r) and angles of emergence (e) as shown in the diagrams:

The correct measurement is given in the diagram:
(1) A
(2) B
(3) C
(4) D