Question

i. Tanmayee from Sid. X uses spectacles. The power of the lenses in her spectacles is -2.5D.
Answer the following questions:
State the type of lenses used in her spectacles.
b. Nume the defect of vision Tunmayee is suffering from
Find the focal length of the lenses used in her spectacles.​

Answer 1

Answer:

if P=1/(f)

therefore, -2.5=1/f

=>f=-1/2.5

as focal length is -ve

therefore,types of lenses used in spectacles is concave lens.