Question

5. The power of a lens in +5 diopters. What is
the nature and focal length of this lens ? At
what distance from this lens should an object
be placed so as to get its inverted image of the
same size?​

Answer 1

Answer:

Here,

P=+5D

we all know that the power of a convex

lens is positive. Therefore, nature of

the lens is real and inverted.

f=?

P=1/f

5=1/f

f =1/5

=0.2m

If the object is placed at a distance of centre of curvature (C) then it give inverted image of the same size.