Question

A Bi-convex lens is made from two spheres of
different radii focus is marked from both
Spherical surfaces and focal length is measured
on both sides .will focal length be equal on both
Sides ?Imagine and write an answer​

Answer 1

Answer:

Refractive index of glass μ=1.5

Given : R

1

=20 cm R

2

=−30 cm

Using lens maker formula :

f

1

=(μ−1)(

R

1

1

−

R

2

1

)

Or

f

1

=(1.5−1)(

20

1

−

(−30)

1

)

⟹ f=24 cm