Physics-
General
Easy
Question
A transparent thin film of uniform thickness and refractive index 
= 1.4 is coated on the convex spherical surface of radius R at one end of a long solid glass cylinder of refractive index 
= 1.5, as shown in the figure. Rays of light parallel to the axis of the cylinder traversing through the film from air to glass get focused at distance 
from the film, while rays of light traversing from glass to air get focused at distance 
from the film. Then
The correct answer is:
Related Questions to study
physics-
A bi-convex lens is formed with two thin plano-convex lenses as shown in the figure. Refractive index n of the first lens is 1.5 and that of the second lens is 1.2. Both the curved surfaces are of the same radius of curvature R = 14 cm. For this bi-convex lens, for an object distance of 40 cm, the image distance will be
A bi-convex lens is formed with two thin plano-convex lenses as shown in the figure. Refractive index n of the first lens is 1.5 and that of the second lens is 1.2. Both the curved surfaces are of the same radius of curvature R = 14 cm. For this bi-convex lens, for an object distance of 40 cm, the image distance will be
physics-General
physics-
A ray OP of monochromatic light is incident on the face AB of prism ABCD near vertex B at an incident angle of 
(see figure). If the refractive index of the material of the prism is 
which of the following is (are) correct ?
A ray OP of monochromatic light is incident on the face AB of prism ABCD near vertex B at an incident angle of (see figure). If the refractive index of the material of the prism is which of the following is (are) correct ?
physics-General
physics-
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
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
physics-General
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
physics-
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
