Ray Optics Test...

In each of the following questions match column-I and column-II and select the correct match out of the four given choices.

A convex lens of glass (n =1.5) has focal length 0.2 m The lens is immersed in water of refractive index 1.33. The change in the power of convex lens is ____________.

For a prism of refractive index √3 , the angle of minimum deviation is deviation is equal to the angle of prism, then angle of the prism is__________.

A ray of light is incident normally on one of the faces of a solid prism of angle 30^o and refractive index √2. The angle of minimum deviation is__________.

A Plano–convex lens has been fixed exactly into a plano–concave lens as shown in figure. Their plane surface are parallel to each other. If both the lenses are made of different materials of refractive indices n₁ and n₂ , R is the radius of curvature of the curved surface of the lens, their focal length of the combination will be_________.

A concave mirror has a focal length 30 cm The distance between the two position of the object for which image size is double of the object is_____________.

A concave lens forms the image of an object such that the distance between the object and the image is 10 cm and the magnification produced is 1/4, the focal length of lens will be__________cm

A prism of certain angle deviates the red and blue rays by 8^o and 12^o respectively. Another prism of the same prism angle deviates the red list at small angle and made of different materials The dispersive powers of the materials of the prisms are in the ratio_________.