
Figure shows a container of width A telescope is fitted at a height above the base on its side wall such that it is focussed at the point as shown. Now aliquid is poured slowly in the container. The refractive index of liquid is Select the correctalternatives




Important Questions on Ray Optics and Optical Instruments

When the space between two glass lenses in combination shown in figure is filled with water, then


. A point object is placed in front of an equiconvex lens of radius of curvature and made of glass of refractive index On placing a convex mirror of radius of curvature behind the lens on image side as shown in figure, the final image is found to coincide with the object. The possible distance between convex lens and convex mirror is

A converging lens is used to form an image on a screen. When the upper half of the lens is covered by an opaque screen



