Part 1
The wavelength of the red light from a helium-neon laser is 633 nm in air but 474 nm in the aqueous humor inside your eyeball. Then the speed of red light through the aqueous humor is.
09
Nov
The wavelength of the red light from a helium-neon laser is 633 nm in air but 474 nm in the aqueous humor inside your eyeball. Then the speed of red light through the aqueous humor is. The wavelength of the red light from a helium-neon laser is 633 nm in air but 474 nm in [...]
A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after refraction its velocity is reduced by 20%. The angle of deviation is :
09
Nov
A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after refraction its velocity is reduced by 20%. The angle of deviation is : A ray of light travelling through rarer medium is incident at very small angle i on a glass slab and after [...]
A vessel of depth x is half filled with oil of refractive index μ1 and the other half is filled with water of refractive index μ2 . The apparent depth of the vessel when viewed from above is:
09
Nov
A vessel of depth x is half filled with oil of refractive index μ1 and the other half is filled with water of refractive index μ2 . The apparent depth of the vessel when viewed from above is: A vessel of depth x is half filled with oil of refractive index μ1 and the other [...]
The bottom of a container is a 4.0 cm thick glass slab. The container contains two immiscible liquids A (μ=1.4) and B (μ=1.3) of depths 6.0 cm and 8.0 cm respectively. What is the apparent position of a scratch on the outer surface of the bottom of the glass slab when viewed through the container?
09
Nov
The bottom of a container is a 4.0 cm thick glass slab. The container contains two immiscible liquids A (μ=1.4) and B (μ=1.3) of depths 6.0 cm and 8.0 cm respectively. What is the apparent position of a scratch on the outer surface of the bottom of the glass slab when viewed through the container? [...]
A vessel of depth d cm is half filled with a liquid of refractive index n1 and the upper half is occupied by the immiscible liquid of refractive index n2. Viewing it from an eye in the upper liquid, the apparent depth of the lower liquid is
09
Nov
A vessel of depth d cm is half filled with a liquid of refractive index n1 and the upper half is occupied by the immiscible liquid of refractive index n2. Viewing it from an eye in the upper liquid, the apparent depth of the lower liquid is A vessel of depth d cm is half [...]
A diverging beam of light from a point source S having divergence angle α, falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and the refractive index u, then the divergence angle of the emergent beam is:
09
Nov
A diverging beam of light from a point source S having divergence angle α, falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and the refractive index u, then the divergence angle of the emergent beam [...]
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A diverging beam of light from a point source S having divergence angle α ,
falls symmetrically on a glass slab as shown. The angles of incidence of the two extreme rays are equal. If the thickness of the glass slab is t and the refractive index u ,
then the divergence angle of the emergent beam is: ,
A ray of light is incident at the glass-water interface at an angle i. It emerges finally parallel to the surface of water. Then, the value of μg would be :
09
Nov
A ray of light is incident at the glass-water interface at an angle i. It emerges finally parallel to the surface of water. Then, the value of μg would be : A ray of light is incident at the glass-water interface at an angle i. It emerges finally parallel to the surface of water. Then [...]
An observer can see through a pin-hole the top end of a thin of height h, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the refractive index of the liquid is
09
Nov
An observer can see through a pin-hole the top end of a thin of height h, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the [...]
A point source of light B is placed at a distance L in front of the center of a mirror of width ‘d’ hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2L from it as shown in fig. The greatest distance over which he can see the image of the light source in the mirror is:
09
Nov
A point source of light B is placed at a distance L in front of the center of a mirror of width ‘d’ hung vertically on a wall. A man walks in front of the mirror along a line parallel to the mirror at a distance 2L from it as shown in fig. The greatest [...]
Two plane mirrors A and B are aligned parallel to each other, as shown in fig. A light ray is incident at an angle of 30^o at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflection (including the first one) before it emerges out is:
09
Nov
Two plane mirrors A and B are aligned parallel to each other, as shown in fig. A light ray is incident at an angle of 30^o at a point just inside one end of A. The plane of incidence coincides with the plane of the figure. The maximum number of times the ray undergoes reflection [...]