INSIGHT UPSC QUIZ

Science & Technology General Science
Q.

A lemon kept in water in a glass tumbler appears to be bigger than its actual size, when viewed from the sides. This is because of which of the following reasons:

Explanation:

ANSWER: (B)

Refraction of Light

  • Light seems to travel along straight-line paths in a transparent medium.
  • When light enters from one transparent medium to another, or when a thick glass slab is placed over some printed matter, the letters appear raised when viewed through the glass slab. 
  • You might have observed that the bottom of a tank or a pond containing water appears to be raised. A pencil partly immersed in water in a glass tumbler appears to be displaced at the interface of air and water. A lemon kept in water in a glass tumbler appears to be bigger than its actual size, when viewed from the sides. These observations indicate that light does not travel in the same direction in all media
  • It appears that when travelling obliquely from one medium to another, the direction of propagation of light in the second medium changes. This phenomenon is known as refraction of light.

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