Question

A person can't see can't see any object distinctly placed beyond 40 cm from his eye. calculate the power of the lens which will enable him to see distant stars clearly

Answer 1

Hope this answer help you and also it make me brainlist

Answer 2

Answer:

Explanation:

1/f= 1/v - 1/u

=> 1/f= 1/-40  - 1/infinity

=>f = -40

Now,

Power= 100/f

=>power= 100/-40

=> power= -2.5 Dioptre