Question

the raddi of curvature of the surface of a double convex lens are 25cm and -25cm.the refractive index of the material of the lens​

Answer 1

Answer:

Solution

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Correct option is C)

Here R

1

= 20 cm, R

2

= -40 cm, f = 20 cm

Using lens maker's formula we get,

20

1

=(μ−1)(

20

1

+

40

1

)

20

1

=(μ−1)

40

3

⇒μ=

3

5

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