Physics-
General
Easy
Question
A light beam is traveling from Region I to Region IV (Refer Figure). The refractive index in Regions I, II, III and IV are 
respectively. The angle of incidence 
for which the beam just misses entering Region IV is
The correct answer is:
As the beam just suffers TIR at interface of region III and IV.
Related Questions to study
physics-
The graph between object coordinate u and image coordinate v for a lens is given below. The focal length of the lens is:
The graph between object coordinate u and image coordinate v for a lens is given below. The focal length of the lens is:
physics-General
physics-
A point object is placed at a distance of 20 cm from a thin plano-convex lens of focal length 15 cm. The plane surface of the lens is now silvered. The image created by the system is at :
A point object is placed at a distance of 20 cm from a thin plano-convex lens of focal length 15 cm. The plane surface of the lens is now silvered. The image created by the system is at :
physics-General
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An equilateral prism is kept on a horizontal surface. A typical ray of light PQRS is shown in the figure. For minimum deviation
An equilateral prism is kept on a horizontal surface. A typical ray of light PQRS is shown in the figure. For minimum deviation
physics-General
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Monochromatic light is incident on a glass prism of angle A. If the refractive index of the material of the prism is 
, a rav, incident at an angle , on the face AB would get transmitted through the face AC of the prism provided :
Monochromatic light is incident on a glass prism of angle A. If the refractive index of the material of the prism is , a rav, incident at an angle , on the face AB would get transmitted through the face AC of the prism provided :
physics-General
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A transparent solid cylindrical rod has a refractive index of 
It is surrounded by air. A light ray is incident at the mid-point of one end of the rod as shown in the figure. The incident angle (q) for which the light ray grazes along the wall of the rod is:
A transparent solid cylindrical rod has a refractive index of It is surrounded by air. A light ray is incident at the mid-point of one end of the rod as shown in the figure. The incident angle (q) for which the light ray grazes along the wall of the rod is:
physics-General
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A light ray is incident perpendicularly to one face to a 
prism and is totally internally reflected at the glass-air interface. If the angle of reflection is 45º, we conclude that the refractive index n is
A light ray is incident perpendicularly to one face to a prism and is totally internally reflected at the glass-air interface. If the angle of reflection is 45º, we conclude that the refractive index n is
physics-General
chemistry-
The complex ion has two optical isomers. Their correct configurations are:
The complex ion has two optical isomers. Their correct configurations are:
chemistry-General
chemistry-
Of the following configurations, the optical isomers are
I) 
II) 
III) 
IV) 
Of the following configurations, the optical isomers are
I)
II)
III)
IV)
chemistry-General
chemistry-
The complexes given below show:
and 
The complexes given below show:
and
chemistry-General
physics-
Statement–I : Two identical conical pipes shown in figure have a drop of water. The water drop tends to move towards tapered end
Statement–II Excess pressure is directed towards centre of curvature and inversely proportional to radius of curvature. Net excess pressure is therefore, directed towards tapered end. So the water drop tends to move towards tapered end
Statement–I : Two identical conical pipes shown in figure have a drop of water. The water drop tends to move towards tapered end
Statement–II Excess pressure is directed towards centre of curvature and inversely proportional to radius of curvature. Net excess pressure is therefore, directed towards tapered end. So the water drop tends to move towards tapered end
physics-General
physics-
A liquid flows through a horizontal tube. The velocities of the liquid in the two sections, which have areas of cross– section 
and 
, are 
and 
respectively. The difference in the levels of the liquid in the two vertical tubes is h–
A liquid flows through a horizontal tube. The velocities of the liquid in the two sections, which have areas of cross– section and , are and respectively. The difference in the levels of the liquid in the two vertical tubes is h–
physics-General
physics-
A massless conical flask filled with a liquid is kept on a table in a vacuum. The force exerted by the liquid on the base of the flask is 
. The force exerted by the flask on the table is 
A massless conical flask filled with a liquid is kept on a table in a vacuum. The force exerted by the liquid on the base of the flask is . The force exerted by the flask on the table is
physics-General
physics-
The vessel shown in the figure has two sections of areas of cross–section and . A liquid of density 
fills both the sections, up to a height h in each. Neglect atmospheric pressure:-
The vessel shown in the figure has two sections of areas of cross–section and . A liquid of density fills both the sections, up to a height h in each. Neglect atmospheric pressure:-
physics-General
physics-
The wires A and B shown in the figure are made of the same material, and have radii 
and 
respectively. The block between them has a mass m. When the force F is mg/3, one of the wires breaks–
The wires A and B shown in the figure are made of the same material, and have radii and respectively. The block between them has a mass m. When the force F is mg/3, one of the wires breaks–
physics-General
physics-
A spherical ball is dropped in a long column of viscous liquid. Which of the following graphs represent the variation of :
i) Gravitational force with time
ii) Viscous force with time
iii) Net force acting on the ball with time
A spherical ball is dropped in a long column of viscous liquid. Which of the following graphs represent the variation of :
i) Gravitational force with time
ii) Viscous force with time
iii) Net force acting on the ball with time
physics-General
