Question

If near point of a person is 75 cm from eye what is power of lens required to correct his sight

Answer 1

u = - infinity

v = -75 cm

1 /-(-d) - 1/ u = 1 /f

1 /75 - 1/ infinity = 1 /f

1 /f = 1 /75

f = 75 cm

Power(P) = 1 /f in meters

P = 100 /75

P = +1.34 D