
For refraction at a convex spherical surface of radius of curvature from a medium of refractive index to medium of refractive index , establish the relation:
.
What will be behaver of a convex lens of the refractive index when it is immersed in a liquid of refractive index ?

Important Questions on Ray Optics and Optical Instruments

A concave mirror of focal length cm produces times magnifies erect image of an object. Find the position of object.

In a combination of lenses in contact, the power of first lens is and the focal length of second lens is. Calculate the power or focal length of the lens combination.


You know the phenomenon of the scattering of light by atmospheric particles. Write a few lines about the blue colour of the sky and reddish colour of the sky in the morning as well as in the evening.

In a prism and , when the prism is at the position of minimum deviation . Show that the refractive index of the material of the prism is:
Also derive the expression for for small angled prism.

Which optical device can produce optical dispersion and which property is responsible for the dispersion of light? Draw a diagram to show that it is possible to obtain white light again after dispersion.
