Explain the use of concave lenses in the following: Peephole in door – InterviewSolution

InterviewSolution

1.	Explain the use of concave lenses in the following: Peephole in door
Answer» Solution :(b) The peephole in DOOR - This is a SMALL safety DEVICE which HELPS us see a large area OUTSIDE the door. This uses one or more concave lenses.

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