AB and CD are two slabs[Fig.2.61.].The medium between the slabs has refractive index 2.Find the minimum angle of incidence at Q, so that the ray is totally reflected by both the slabs.
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Figure 9.35 shows a cross-section of a glass fibre of refractive index 1.68. The outer covering of the pipe is made of a material of refractive index 1.44. What is the range of the angles of the incident rays with the axis of the pipe for which total reflections inside the pipe take place, as shown in the figure. :

Figure 9.35 shows a cross-section of a glass fibre of refractive index 1.68. The outer covering of the pipe is made of a material of refractive index 1.44. What is the range of the angles of the incident rays with the axis of the pipe for which total reflections inside the pipe take place, as shown in the figure. What is the answer if there is no outer covering of the pipe? :

A rectangular glass slab ABCD of refractive index n_1 is immersed in water of refractive index n2(n1ltn2) . A ray of light is incident at the surface AB of the slab as shwon. The maximum value of the angle of incidence alpha max such that the ray comes out from the other surface CD is given by .

Consider a ray of light incident from air onto a slab of glass (refractive index n) of width d, at angle theta . The phase difference between the ray reflected by the top surface of the glass and the bottom surface is:

A ray of light is incident on a prism ABC of refractive index sqrt3 as shown in Fig.3.14. Find the angle of incidence for which the deviation of light ray by the prism ABC is minimum. .

A ray of light is incident normally on one of the faces of a prism of apex angle 30^@ and refractive index sqrt2 .Find the angle of deviation for the ray of light.

A ray of light travelling in a transparent medium of refractie index mu falls on a surface separatign the medium from air at an angle of incidence of 45^@ .For which of the following velues of mu ,the ray can indergo total internal reflection?

Figure shows two identical capacitors C_1 and C_2 each of 1 mu F capacitance connected to a battery of 6 V. initially switch S is closed. After sometime S is left open and dielectric slab of dielectric constant k = 3 are inserted to fill completely the space between the plates of the two capacitors. How will the potential difference between the plates of the capacitors be affected after the slabs are inserted?

The refractig angle of a prism is A and the refractive index of its material is mu .When a ray of light is incident on the face AB of the prism,after refraction through the prism,the ray of light just grazes along the face AC as shown in Fig.3.21. Determine the value of the angle of incidence in terms of A and mu .