Question

Near point of Hypermetropic eye is 75cm from eye. Whai is power of lens required to read clearly a book held at 25 cm from eye​

Answer 1

Explanation:

3 .................................

Answer 2

Answer:

ATQ

v = -75cm

u = -25cn

use lens formula

1/f = 1/v - 1/u

1/f = -1/75 + 1/25

1/f = 2/75cm

1/f in metre = 200/75 = 8/3

power = 1/f in metre

so power = 8/3 = 2.6D