Question

The focal length of a convex lens 0.2 metre find its power with proper sign

Answer 1

focal length=0.2m

power=1/focal length

= 1/0.2

=5 Dioptre

hope it will help you

Answer 2

F=+0.2m(convex mirror has positive focal length)

P=1/f(in m)

= 1/0.2

=10/2

= + 5 &D

Hopefully this will be helpful.........