Question

A transportent sphere of raitius 6ch is kept in air. An object is placed at 12cm distance from the surface of the sphere and it's real image is formed at the same distance from the second surface of the sphere. Find the refractive index of the sphere.​

Answer 1

Focal length of convex lens, f=8 cm

Object distance, u=−12 cm

Using lens formula

v

1

−

u

1

=

f

1

where v is the image distance.

∴

v

1

−

−12

1

=

8

1

⟹ v=+24 cm

(+ve sign indicates that image is formed behind the lens)

Hence the image formed is real and inverted.

Answered By=shreyash. .......

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