Question

For a specific glass lens f=0.5 .This is the only Information given to the student.

Which type of lens is given to him and what is its power?

a) power 2D ; convex lens

b) power 1D ; concave lens

c) power -0.5; concave lens

d) power -0.25 D ; convex lens ​

Answer 1

Answer:

Power = 1/ focal length

Power = 1/ .5

Power = 2 Dioptre

Since power is positive lens is convex. So (a ) option 8s correct

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