Question

The optician prescribes spectacles with the lenses of +1.25 D for James what type of lens is this

Answer 1

Here is your answer

`<b>CONVEX LENS </b>`

Since power is the reciprocal of focal length.

i.e. P=1/f

Focal length of convex lens is positive.

Here power of given lens is positive

So, given lens is convex lens.

HOPE IT IS USEFUL