Physics
Jatin puts a pencil into a glass container having water and is surprised to see the pencil in a different state.
(a) What change is observed in the appearance of the pencil?
(b) What is the reason for this change?
(c) Classify the following as a real or virtual image:
The image of a candle flame formed on a screen by a convex lens.
Answer
(a) The pencil appears bent at the water surface; the submerged part looks raised and slightly shortened.
(b) This happens due to refraction of light. Light rays from the submerged pencil bend away from the normal as they pass from water (denser) to air (rarer), making the pencil appear at a higher position than it actually is
(c) Image of candle is a real image as it can be formed on a screen.
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