3.Rohan from std X uses spectacles. The power of
the lenses in her spectacles is -2.5 D.
Answer the following question
a)State the type of lenses used in his spectacles
b)Name the defect of vision Rohan is suffering
from.
c) Find the focal length of the lenses used in his
spectacles.
the lenses in her spectacles is -2.5 D.
Answer the following question
a)State the type of lenses used in his spectacles
b)Name the defect of vision Rohan is suffering
from.
c) Find the focal length of the lenses used in his
spectacles.
Answers & Comments
a.)type of lens- concave lens ( negative focal length
b) defect of vision - myopia
c) focal length= -40cm
Explanation:
power= 2.5d
1/f=-2.5
100cm/f= -2.5
f =-40cm