A bird in air looks at a fish vertically below it and inside water, is  the height of the bird above the surface of water and , the depth of the fish below the surface of water. If refractive index of water with respect to air be n , then what is the distance of the fish observed by the bird

A tank contains two different liquids which do not mix with each other as shown in figure. The lower and upper liquids are at depths  and  respectively. An object o is located at the bottom. When seen vertically from above, locate the position of image of o.

At any point on a curve if the subtangent and subnormal are equal then at that point the length of the tangent is equal to

For such questions, we should know the formula of length of tangent, subnormal and subtangent.

The below diagram represents the human digestive system. Identify A, B, C, D and E

A vessels of depth t is half filled with oil of refractive index  and the other half is filled with water (refractive index  ). The apparent depth of the vessel when viewed from above is…….

A plane mirror is placed at the bottom of a tank containing a liquid of refractive index n.P.  is a small object at a height h above the mirror. An observer 0, vertically above  P, outside the liquid sees P and its image in the mirror. The apparent distance between these two wall be.

The length of the normal to the curve at any point varies as

For such questions, we should know the formula of length of normal.

A ray of light is incident on one  equilateral glass prism placed on a horizontal table. For minimum deviation which of the following is true?

A ray of light is incident normally on one of the faces of a proms of apex   and  n= what is the angle of deeviation which of the following is true?

There is a prism with refractive index equal to  and the refracting angle equal to . One of the refracting surfaces of the prism is polished. A beam of monochromatic light will retrace its path if its angle of incidence over the refracting surface of the prism is.........

The minimum angle of deviation of a prism of refractive index 1.732  is equal to its refracting angle. What is the angle of prism?

An equilateral prism deviates a ray through  for two angles of incidence differing by  . What is the nof the prism?

The minimum deviation produced by a glass prism of angle   is  . If the velocity of light in vaccum is . Then what is the velocity of light in glass in m/s ?

Two identical parallel plate capacitors are placed in series and connected to a constant voltage source of volt. If one of the capacitor is completely immersed in a liquid of dielectric constant , then the potential difference between the plates of the other capacitor will change to

Angle of prism is A and its one surface is silvered. Light rays falling at an angle at incidence 2 A on first surface return back through the same path after suffering reflection at second silvered surface What is the refractive index of material?

A light ray is incident perpendicular to one face of   prism and is totally internally reflected at the glass-air interface. If the angle of reflection is  . We conclude that the refractive index....
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