A coin in a beaker filled with water appears raised. This ph enomenon occurs because of the property of

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Q: 74 (NDA-I/2010)
A coin in a beaker filled with water appears raised. This ph enomenon occurs because of the property of

question_subject: 

Science

question_exam: 

NDA-I

stats: 

0,16,18,3,16,12,3

keywords: 

{'ph enomenon': [0, 0, 1, 0], 'refraction': [0, 0, 1, 0], 'beaker': [0, 0, 1, 0], 'coin': [0, 3, 6, 4], 'reflection': [1, 1, 2, 19], 'light': [16, 4, 34, 62], 'total internal reflection': [0, 1, 2, 1], 'water': [65, 15, 80, 129], 'property': [15, 0, 8, 22], 'interference': [0, 2, 1, 5]}

The phenomenon of a coin appearing raised when placed in a beaker filled with water is due to the property of refraction of light. Refraction occurs when light passes from one medium to another and changes its direction. In this case, when light travels from air to water, it undergoes refraction.

When light passes from air to water, it slows down and changes direction. This change in direction causes the light ray to bend at the air-water interface. As a result, the image of the coin appears to be raised or displaced when viewed from above the water surface.

Refraction is responsible for various optical illusions, such as objects appearing bent or distorted when partially submerged in water. It is also the reason why objects appear closer or farther in water compared to their actual position in air.

Therefore, option 2 - refraction of light is the correct answer. It accurately explains the phenomenon of the raised coin in the beaker filled with water.

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