Physics, asked by aushi093, 28 days ago

find the focal length of a lens of power -5.0. what type of lens is this

Answers

Answered by johnbobby

0

Answer:

-0.2m

Explanation:

AS POWER IS THE RECIPROCAL OF THE FOCAL LENGTH THE FOCAL LENGTH WILL BE THE RECIPROCAL OF POWER ....WHICH MAKES THE FOCAL LENGTH -1/5= -2m

As the focal length is negative the lens is concave as in concave mirror light rays diverge and forms a virtual focus behind the mirror which makes the sign negative.Hope it helps!!!!

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