Ray Optics and ...

The real depth of a swimming pool that appears to be $$10\ m$$ for a swimmer if the index of water is $$1.33$$ is

In order to increase the angular magnification of a simple microscope, one should increase

A beam of light is converging towards a point $$L$$. A plane parallel plate of glass of thickness $$t$$, refractive index $$\mu$$ is introduced in the path of the beam. The convergent point is shifted by : 

The radius curvature for a convex lens is $$40\ cm$$, for each surface. Its refractive index is $$1.5$$. The local length will be

The time taken by sunlight to cross a $$5\ mm$$ thick glass plate $$(\mu =3/2)$$ is

Finger prints are observed by the use of 

A person using a lens as a simple microscope sees an 

A ray of light is incident on the hypotenuse of a right-angled prism after travelling parallel to the base inside the prism. If $$\mu $$ is the refractive index of the material of the prism, the maximum value of the base angle for which light is totally reflected from the hypotenuse is :

The refractive index of the material of a concave lens is $$\mu $$  and is placed in the medium of refractive index $$\mu ^{1}$$. If $$\mu ^{1}>\mu $$, then which of the following ray diagram is correct:

A beam of parallel rays is incident on a transparent slab of refractive index $$\sqrt{3}$$ making an angle $$30^{\circ}$$ with the surface of the slab. If the width of incident beam of light is 1.732 mm, the width of refracted beam is: