Ray Optics and ...

While finding the refractive index of a glass slab, the travelling microscope is focussed on ink dot on a white paper at position 4.320 cm. When a glass slab is placed on this ink dot on paper, the microscope is raised through 1.80 cm. The thickness of glass slab of refractive index $$\dfrac{3}{2}$$ is :

The refractive index of glass with respect to air is $$\dfrac{3}{2}$$ and that of water with respect to air is $$\dfrac{3}{2}$$. What is the refractive index of glass with respect to water?

The phenomenon of bending of light at the surface of separation of two media is called :

Which of the following forms a virtual and erect image for all positions of the object ?

A ray of light is incident on a thick slab of glass of thickness t as shown in the figure. The emergent ray is parallel to the incident ray but displaced sideways by a distance d. If the angles are small then d is  

There is an insect inside a cabin eying towards a thick glass plate $$P_1$$. Insect sees the images of light source across the glass plate $$P_1$$ outside the cabin. The cabin is made of thick glass plates of refractive index $$ \mu =\frac{3}{2}$$   and thickness is 3 cm. The insect is eying from the middle of the cabin as shown in the figure. ( glass plates are partially reflective and consider only paraxial rays)
At what distance ( from the eye of insect) will the eye see the first image? 

Of the following instruments, which one would be used for navigating a ship?

Light is incident on a glass surface at polarizing angle of $$57.5^{\circ}$$. Then the angle between the incident ray and the refracted ray is:

A convergent beam of light passes through a diverging lens of focal length 0.2 m and comes to focus 0.3 m behind the lens. The position of the point at which the beam would converge in the absence of the lens is :

The minimum distance between an object and its real image formed by a convex lens is: