Question

What would be the position of the image with respect to the retina for a hypermetropic eye, when the object is placed at (i) Infinity (ii) at 25 cm from the eye

Answer 1

Answer:

Hypermetropia can be corrected by using a convex lens. A convex lens converges the incoming light such that the image is formed on the retina.

An object at 25 cm forms an image at the near point of the hypermetropic eye. Here, near point is 1 m.

Given,

Object distance,u=−25 cm

          Image distance, v=−100 cm

From lens formula, v1​−u1​=f1​

                              −1001​−−251​=f1​

                              Focal length,f=100/3 cm=1/3 m

Power, P=f1​=1/31​=3 D

Explanation: