Question

LIGHT
A person with a myopic cye is not able to see beyond 3 m distinctly. Determine the nature, focal length and power
of the lens required.
the print clearly How far​

Answer 1

Given ,v = -3m or -300cm

u = -infinity

f = ?

according to lens formula ,

1/f = 1/v - 1/u

1/f = -1/300 - (-1/infinity)

1/f = -1/300 + 1/infinity

focal length = -300 cm or -3metre

now,

power = 1/focal length(metre)

power = -1/3

power = -0.33 dioptre

nature = myopia ( short sightedness)

I hope it helps you