Question

a double convex lens has raddi of curvature of 1 m and 2 m. what should be the refractive index of the medium so that the focal length of the lens is 50cm​

Answer 1

Answer:

Hope it's helpful..

Step-by-step explanation:

Given,

R

1

=1m=10cm

R

2

=2m=20cm

f=50cm

n=?

Using the lens makers formula:

f

1

=(n−1)(

R

1

)

1

−

R

2

1

50

1

=(n−1)(

10

1

+

20

1

)

Solving the above equation we get,

Refractive index, n=1.13