Ray Optics Test...

In the visible region the dispersive powers and the mean angular deviations for crown and flint glass prisms are ω, ω\' and d, d\' respectively. The condition for getting deviation without dispersion when the twoprisms are combined is

The solar spectrum during a complete solar eclipse is

A given ray of light suffers minimum deviation in an equilateral prism P. Additional prisms Q and R of identical shape and material are now added to P as shown in the figure. The ray will suffer

In the given figure, what is the angle of prism?

A convex lens, a glass slab, a glass prism and a solid sphere all are made of the same glass, the dispersive power will be

A parallel beam of white light falls on a convex lens. Images of blue, yellow and red light are formed on other side of the lens at a distance of 0.20 m, 0.205 m and 0.214 m respectively. The dispersive power of the material of the lens will be

The spectrum of an oil flame is an example for

In an equilateral prism if incident angle is 45° thenminimum deviation is

For the myopic eye, the defect is cured by

Lens used to remove long sightedness (hypermetropia)is
or
A person suffering from hypermetropia requires which type of spectacle lenses