A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence $(∠ i)$ . He then measures the corresponding values of the angle of refraction $(∠ r)$ and the angle of emergence $(∠ e)$ for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be

∠ i > ∠ r > ∠ e

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∠ i = ∠ e > ∠ r

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∠ i, ∠ r, ∠ e

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∠ i = ∠ e, ∠ r

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Solution

The correct option is B $∠ i = ∠ e > ∠ r$
We observed, that when a ray of light passes from rarer medium to denser medium, it diverges toward the normal, and when this refracted light emerges, then it going away from the normal, when the incident and the emergent medium is same then the angle of incidence and the angle of emergent always will be equal. If mediums are different, then both $i a n d e$ will be different.

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Similar questions

Q. A student very cautiously traces the path of a ray through a glass slab for different values of the angle of incidence

(∠ i)

. He then measures the corresponding values of the angle of refraction

(∠ r)

and the angle of emergence

(∠ e)

for every value of the angle of incidence. On analysing these measurements of angles, his conclusion would be :
(a)

∠ i > ∠ r > ∠ e

(b)

∠ i = ∠ e > ∠ r

(c)

∠ i < ∠ r < ∠ e

(d)

∠ i = ∠ e < ∠ r

Q. In your laboratory, you trace the path of light rays through a glass slab for different values of angle of incidence

(∠ i)

and in each case, measure the values of the corresponding angle of refraction

(∠ r)

and angle of emergence

(∠ e)

. Based on your observations, the correct conclusion is

Q. A student performs the experiment on tracing the path of a ray of light passing through a rectangular glass slab for different angles of incidence. He measures the angle of incidence ∠i, angle of refraction ∠r and angle of emergence ∠e for all his observations. He would find that in all cases:
(1) ∠i is more than ∠r but (nearly) equal to ∠e
(2) ∠i is less than ∠r but (nearly equal to ∠e
(3) ∠i s more than ∠e but (nearly) equal to ∠r
(4) ∠i is less than ∠e but (nearly) equal to ∠r

A student traces the path of a ray of white light through a rectangular glass slab and marks, the angles of incidence $(∠ i)$ refraction $(∠ r)$ and emergence $(∠ e)$ as shown. Which angle or angles has he not marked correctly?

Q. A student traces the path of a ray of light through a rectangular glass slab for the different values of angle of incidence. He observes all possible precautions at each step of the experiment. At the end of the experiment, on analysing the measurements, which of the following conclusions is he likely to draw ?

(a) ∠ i = ∠ e < ∠ r (b) ∠ i < ∠ e < ∠ r (c) ∠ i > ∠ e < ∠ r (d) ∠ i = ∠ e > ∠ r

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