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 |

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

**(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