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The slab of a material of refractive index 2 shown in figure has curved surface  of radius of curvature  and a plane surface . On the left of  is air and on the right of  is water with refractive indices as given in figure. An object  is placed at a distance of  from pole  as shown. The distance of the final image of  from , as viewed from the left is

a)

b)

30

c)

40

d)

50



Question ID - 152263 | SaraNextGen Top Answer

The slab of a material of refractive index 2 shown in figure has curved surface  of radius of curvature  and a plane surface . On the left of  is air and on the right of  is water with refractive indices as given in figure. An object  is placed at a distance of  from pole  as shown. The distance of the final image of  from , as viewed from the left is

a)

b)

30

c)

40

d)

50

1 Answer
127 votes
Answer Key / Explanation : (b) -

(b)

In case of refraction from a curved surface, we have

 the curved surface will form virtual image  at distance of  from . Since the image is virtual there will be no refraction at the plane surface  (as the rays are not actually passing through the boundary), the distance of final image  from  will remain

127 votes


127