A student puts his pencil into an empty trough and observes the pencil from the position as indicated in the Fig. - Noon Academy

A student puts his pencil into an empty trough and observes the pencil from the position as indicated in the Fig.

Class 10 | ICSE | Physics | Refraction of Light at Plane Surfaces | Selina

A student puts his pencil into an empty trough and observes the pencil from the position as indicated in the Fig.

(i) What change will be observed in the appearance of the pencil when water is poured into the trough?

(ii) Name the phenomenon which accounts for the above-started observation.

(iii) Complete the diagram showing how the student’s eye sees the pencil through water.

Solution:

(a) When water is poured into the trough, the part of the pencil that is submerged appears short and rises up.

(b) The foregoing finding is due to refraction of light.

(c) Here’s the diagram you’ll need:

i

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