Question

A person having myopia uses a lens
of focal length 20 cm to see the
objects distinctly. What is the power
of the lens in dioptre?​

Answer 1

Answer:

your answer is 0.05P

Explanation:

this will help you

Answer 2

Answer:

The distance of far point X=2m To view distant object clearly, concave lens of focal length −2m should be used.i.e. f=−X=−2mPower of lens =P= f1= −21

=−0.5p

Hope it helps you