Question

An older person wears bifocals. The lower portion of the lens is converging and has a focal length of 80 cm. The upper portion is diverging and has focal length of - 50 cm. What are near and far points of person’s unaided eye?

Draw separate diagram for each lens label near and far points which ever is applicable.

PLEASE DRAW THE 2 SEPARATE DIAGRAMS, ONE FOR EACH LENS, AND LABEL THE NEAR AND FAR POINTS.

Problem 14 An older person wears bifocals. The lower portion of the lens is converging and has a focal length of 80 cm. The upper portion is diverging and has focal length of - 50 cm. What are near and far points of person's unaided eye? Draw separate diagram for each lens label near and far points which ever is applicable.

Answer 1

* In mybia person is not able to see fax objects clearly. We use Concave lens to Correct it. tot = 1/2 U=0 * see vef or far point = f = 50cm Ane In Hypermetropia, berson are not able to nearby objects clearly. We use Convex lens to correct it here u=-25c.m hear point of normal eye. 5-86 =-11 400 too = -366 36c.m or hearpoint 36.360.m -bet → + são 80 80 25.

Date: Image at far point. location at Object Ato Image object 256 m (At neas point)