Question

Reema is 21 years old and wears spectacle having a power +1 D. Answer the following questions.
a) Name the eye defect she has.

b) State two reasons for this defect.

c) Compute the focal length of this lens.

d) Which lens is used by Reema?​

Answer 1

Explanation:

a) she has farsightedness/hypermeteropia

b) the eyeball flatens and image forms beyond retina

c) power(p) =1/focul length (in meters)

= 1 = 1/focul length

= focul length = 1/1 meters

= focul length = 1 meter

d) Reema uses a convex lens as it has a positive power.