Question

A man having short-sightedness, can see upto 5 m clearly.What should be the power of the lens used so that he can see the object placed at infinity.Also draw it ray diagram​

Answer 1

Answer:

Explanation:

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=−2m

Power of lens =P=  

f

1

​  

=  

−2

1

​  

=−0.5D