Physics
A student puts his pencil into an empty trough and observes the pencil from the position as indicated in the figure.
(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.
Answer
(a) When a student puts his pencil into an empty trough, and later pours water in the same trough, the part of the pencil which is immersed in water will look short and raised up.
(b) The above observation is based on the phenomenon of refraction of light.
(c) Below is the diagram showing how the student’s eye sees the pencil through water:
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