Find the focal length of a lens of power minus 2. 0 D what type of lens is this
Answers
Answered by
33
Answer:The answer is 1/2
Explanation:As the formula for power of lens is: p or D=1/f
-2=1/f
-2f=1
So,f=1/2
Answered by
21
Answer: P = - 2 D
F = ?
relation between power and
focal length is P = 1/F.
So F = 1/P
F = 1/-2
F = -1/2
If focal length is negative in
case of lens then it is
concave lens.
If focal length is positive in
case of lens then it is convex
lens.
Therefore the type of lens is
concave lens
Explanation:
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