A pencil partly immersed in water in a glass tumbler appears to be displaced at the interface of air and water because

Glass tumbler creates an illusion and pencil appears displaced.

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Light does not travel with same speed in all media.

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Pencil and water react and the light direction changes.

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None of these.

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Solution

The correct option is B
Light does not travel with same speed in all media.

Light travels fastest in the vacuum, but when it enters a denser medium the speed of light decreases. Hence, the light coming from the immersed part of the pencil bends away from the normal because the speed of light in air is more than in water. Due to this, the pencil appears displaced at the interface.

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Q. A pencil partly immersed in water in a glass tumbler appears to be bent at the interface of air and water. Name the phenomenon of light responsible for it.

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Question 22
A pencil when dipped in water in a glass tumbler appears to be bent at the interface of air and water. Will the pencil appear to be bent to the same extent, if instead of water we use liquids like kerosene or turpentine. Support your answer with reason.

Why does a pencil partly immersed in water appears to be bent inside the water?

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