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Q.

Is it true plane mirrors are used in periscopes and solar cookers?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
A periscope is an instrument that utilizes a system of prisms, lenses, or mirrors to reflect images through a tube. Plane mirrors are also used in a periscope. The two plane mirrors in a periscope are positioned with respect to one another at a 45 degree angle with respect to the sides of the tubes because the inclination makes it easier for light to pass through the periscope's inner gap while preventing reflections on any unwanted areas. Solar cookers use plane mirrors to focus light so that the maximum solar radiation can be utilized.
 
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