Ray Optics and ...

A tall man of height 6 feet, want to see his full image. Then required minimum length of the mirror will be -

A fish looking up through the water sees outside world contained in a circular horizon. If the refractive index of water is 4/3 and fish is 12 cm below the surface, the radius of the circle is centimetres is

The index of refraction of diamond is 2.0. The velocity of light in diamond in cm/s is -

Chromatic aberration(distance between the focal lengths for extreme wavelengths) of a convex lens can be reduced by(Assume lenses are kept in vacuum)

A ray of light is incident normally on the first refracting face of the isosceles prism of refracting angle A. The ray of light comes out at grazing emergence. If one half of the prism (shaded position) is knocked off, the same ray will :

A ray of light falls on the surface of spherical glass paperweight making an angle $\alpha$ with the normal and is refracted in the medium at an angle $\beta$. The angle of deviation of the emergent ray from the incident ray is

A ray of light falls on a prism $ABC (AB=BC)$ and travels as shown in the figure. The refractive index of the material of prism should be at least :

The cause of mirage formation in desert areas is

A beam of light, consisting of red, green and blue colours, is incident on a right-angled prism, as shown. the refractive indices of the material of the prism for the above red, green and blue wavelengths are 1.39 1.44 and 1.47 respectively. The prism will :

The angle of the prism for which there is no emergent ray will be, if its critical angle is ${ i }_{ c }$