Question

Study the following four experimental set-ups I, II, III and IV for the experiment, To trace the path of a ray of light through a rectangular glass slab."

Answer 1

Explanation:

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Answer 2

Option D is the correct answer.

Explanation:

Experiment IV will give the right results. It has the optimal angle of incidence, hence the lateral displacement between the emergent ray and incident ray will be at a maximum.

Experiment I - Incident ray cannot be at a normal to observe refraction.

Experiment III - Pins placed too close to each other.

Experiment II - Angle of incidence is large and could be greater than the critical angle. So IV is ideal for the experiment.

Option D is the correct answer.