Question

if the power of a lens is +2.0 D, what does it imply?

Answer 1

Hola User__________________

Here is Your Answer..!!!
_________________________

⭐Actually welcome to the concept of the RAY OPTICS..

⭐Basically we know that ... Power of a lens is the reciprocal of the focal length in metres..

⭐So here , P = 1/f

⭐so the focal lenght of the lense will be f = 1/P

⭐we get the focal length as f = 1/2 ==》 f = + 0.5 m


⭐Now from here we can conclude that .. as the Focal length of the Given unknown lens is Positive 0.5 ...


⭐Then WE CAN CONCLUDE THAT THE GIVEN LENS IS A CONVEX LENS AS CONVEX LENS HAS ALWAYS A POSITIVE FOCAL LENGTH ..

______________________________

hope it helps u...☺

Answer 2

It means it is convex lens and is useful to see nearby  objects. Focal length 50cm