Ray Optics and ...

A point object is placed on principal axis of concave mirror of radius of curvature 10 cm at a distance 21 cm from pole of the mirror.  A glass slab of thickness 3 cm and refractive index 1.5 is placed between object and mirror $$.$$ Find the imaged position of the image formed in cm is 

Which colour shows maximum deviation when light is dispersed through prism?

An object is placed $$12 \ cm$$ to the left of a converging lens of focal length $$8 \ cm $$. Another converging lens of $$6 \ cm$$ focal length is placed at a distance of $$ 30 \ cm$$ to the right of the first lens. The second lens will produce

Three right angied prisms of refractive indices $$\mu_1$$,$$\mu_2$$ and $$\mu_3$$ are joined together so that the faces of the middle prism are each in contact with one the outside prism.If the ray passes through the composite block undeviated,then

The angle of minimum deviation measured with a prism is $$30^o$$ and the angle of prism $$60^o$$. The refractive index of prism material is -

When light rays are incident on a prism at an angle of $$45^o$$, the minimum deviation is obtained. If the refractive index of the material of the prism is $$\sqrt 3$$, then the angle of prism will be

A thin lens produce an image of the same size as the object.Then first the optical center of the lens, distance of the object is 

Three right angled prisms of refractive indices $$\mu_1$$, $$\mu_2$$ and $$\mu_3$$ are joined together ao that the faces of the middle prism are each in contact with one of the outside prisms. If the ray passes through the composite block undeviated, then 

A thick plane mirror shows a number of images of the filament of an electric bulb. Of these, the brightest image is the:

A coordinate axis as shown in the the figure is kept in front of a converging lens at a distance 2f from it, where f is the focal length of the lens. Which of the following shows the approximate shape of the image? Assume that X-axis is the principal axis of the lens.