Question 11:
difficult
Match the corresponding entries of column-1 with coloumn-2 (Where m is the magnification produced by the mirror) :
Question 12:
difficult
How much water should be filled in a container 21 cm in height, so that it appears half filled when viewed from the top of the container
(given that \[_{\alpha}\mu_{\omega} =4/3\])
Question 13:
difficult
Immiscible transparent liquids A,B,C,D and E are placed in a rectangular container of glass with the liquids making layers according to their densities. The refractive index of the liquids are shown in the adjoining diagram. The container is illuminated from the side and a small piece of glass having refractive index 1.61 is gently dropped into the liquid layer. The glass piece as it descends downwards will not be visible in
Question 14:
difficult
As shown in figure light P enters to slab at an angle 60° with normal and inside slab Q makes total internal reflection. Find minimum refractive index of slab.
Question 15:
difficult
Figure shows a mixture of blue, green and red coloured rays incident normally on a right angled prism. The critical angles of the material of the prism for red, green and blue are 46°, 44° and 43° respectively. The arrangement will separate.
Question 16:
difficult
A light ray travelling in a glass medium is incident on glass-air interface at an angle of incidence q. The reflected (R) and transmitted (T) intensities, both as function of q, are plotted. The correct figure is : (θc = critical angle)
1. 
2. 
3. 
4. 
Question 17:
difficult
As shown in figure, a convergent lens is placed inside a cell filled with liquid. The lens has focal length +20 cm when in air, and its material has refractive index 1.50. If the liguid has refractive index 1.60, the focal length of the system is :
Question 18:
difficult
Two convex lens each of focal length 20 cm are separated by 125 cm. An object of height 0.5 cm placed at distance 25 cm left side from the first lens then, find height of the final image.
Question 19:
difficult
The angle of a prism is ‘A’. One of its refracting surfaces is silvered. Light rays falling at an angle of incidence 2A on the first surface returns back through the same path after suffering reflection at the silvered surface. The refractive index μ, of the prism is :
Question 20:
difficult
A beam of light consisting of red, green and blue colours incident on a right angled prism. The refractive index 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 :-