Question

A boy uses spectacles of focal length -50 cm. Name the defect of vision he is suffering from. Compute the power of this lens.

Answer 1

Answer:

Given that,

focal length=-50cm

power=100/focal length (cm)

power=-100/50

power=-2D

Negative symbol indicates that it is a convex lens....and he is suffering from myopia...

Explanation:

Hope it helps you frnd.....