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Q.

Is it true that when two plane mirrors inclined at an angle of 45° to the vertical tube and facing one another constitute a periscope?


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a

True

b

False 

answer is A.

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Detailed Solution

The above statement is True.
It is true to say that a periscope consists of two plane mirrors facing toward each other and inclined at 45° from the base to each other, and the plane mirrors cause infinite images because the image for one mirror acts as the object for the other image. Periscope is used mostly in submarines to see the objects above the sea.
  
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