Viewfinders, used in automobiles to locate the position of the vehicles behind, are made of

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Q: 79 (CDS-I/2011)
Viewfinders, used in automobiles to locate the position of the vehicles behind, are made of

question_subject: 

Science

question_exam: 

CDS-I

stats: 

0,31,28,4,19,31,5

keywords: 

{'viewfinders': [0, 0, 0, 1], 'plane mirror': [0, 0, 0, 7], 'convex mirror': [0, 0, 0, 3], 'concave mirror': [0, 0, 2, 6], 'parabolic mirror': [0, 0, 0, 1], 'vehicles': [0, 0, 1, 8], 'automobiles': [1, 0, 4, 2]}

The correct answer for the question is option 3, convex mirror.

A viewfinder is an important component in automobiles that helps the driver locate the position of vehicles behind them. The purpose of a viewfinder is to provide a wide field of view to the driver, allowing them to see as much of the surroundings as possible.

A convex mirror is commonly used in viewfinders due to its unique reflective properties. A convex mirror is curved outwards, with the reflecting surface bulging outwards. This shape allows the mirror to reflect light outwards in a diverging manner, which results in a wider field of view.

The convex shape of the mirror causes the light rays to spread out, making objects appear smaller than they actually are. However, this distortion is necessary for a viewfinder as it provides a wider area of visibility.

Option 1, a plane mirror, would not be suitable for a viewfinder as it does not provide a wide field of view. Option 2, a concave mirror, focuses the light to a point, which is not ideal for a viewfinder. Option 4, a parabolic mirror, can provide a focused image but may not provide the wide field of view required in a viewfinder. Therefore, option 3, convex

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