Physics
General
Easy
Question
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
The correct answer is:
Related Questions to study
physics
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.
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.
physicsGeneral
Maths-
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
The given point where the subtangent and subnormal is equal is (x1, y1).
Subtangent is the projection of tangent on x-axis.
Subnormal is the projection of normal on x-axis.
The formula of subtangent is
The formula of subnormal is
The formula for length of tangent at point (x1, y1)
Subtangent = Subnormal
This is the required answer.
Subtangent is the projection of tangent on x-axis.
Subnormal is the projection of normal on x-axis.
The formula of subtangent is
The formula of subnormal is
The formula for length of tangent at point (x1, y1)
Subtangent = Subnormal
This is the required answer.
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
Maths-General
The given point where the subtangent and subnormal is equal is (x1, y1).
Subtangent is the projection of tangent on x-axis.
Subnormal is the projection of normal on x-axis.
The formula of subtangent is
The formula of subnormal is
The formula for length of tangent at point (x1, y1)
Subtangent = Subnormal
This is the required answer.
Subtangent is the projection of tangent on x-axis.
Subnormal is the projection of normal on x-axis.
The formula of subtangent is
The formula of subnormal is
The formula for length of tangent at point (x1, y1)
Subtangent = Subnormal
This is the required answer.
biology
The below diagram represents the human digestive system. Identify A, B, C, D and E
The below diagram represents the human digestive system. Identify A, B, C, D and E
biologyGeneral
physics
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 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…….
physicsGeneral
physics
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.
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.
physicsGeneral
Maths-
The length of the normal to the curve 
at any point varies as
The given curve is 
Ordinate means the y-axis
And abscissa means x-axis
The formula of length of the normal at point (x,y) is given by
Here, m =
Now, we will find the value of
We will substitute this value in the formula of length.
Length is proportional to y12 as "a" is constant.
We can see the length of the normal depends on the square of y. It means the length of normal varies square of ordinate.
Ordinate means the y-axis
And abscissa means x-axis
The formula of length of the normal at point (x,y) is given by
Here, m =
Now, we will find the value of
We will substitute this value in the formula of length.
Length is proportional to y12 as "a" is constant.
We can see the length of the normal depends on the square of y. It means the length of normal varies square of ordinate.
The length of the normal to the curve at any point varies as
Maths-General
The given curve is
Ordinate means the y-axis
And abscissa means x-axis
The formula of length of the normal at point (x,y) is given by
Here, m =
Now, we will find the value of
We will substitute this value in the formula of length.
Length is proportional to y12 as "a" is constant.
We can see the length of the normal depends on the square of y. It means the length of normal varies square of ordinate.
Ordinate means the y-axis
And abscissa means x-axis
The formula of length of the normal at point (x,y) is given by
Here, m =
Now, we will find the value of
We will substitute this value in the formula of length.
Length is proportional to y12 as "a" is constant.
We can see the length of the normal depends on the square of y. It means the length of normal varies square of ordinate.
physics
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 on one equilateral glass prism placed on a horizontal table. For minimum deviation which of the following is true?
physicsGeneral
physics
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?
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?
physicsGeneral
physics
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.........
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.........
physicsGeneral
physics
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?
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?
physicsGeneral
physics
An equilateral prism deviates a ray through 
for two angles of incidence differing by 
. What is the nof the prism?
An equilateral prism deviates a ray through for two angles of incidence differing by . What is the nof the prism?
physicsGeneral
physics
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 ?
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 ?
physicsGeneral
physics-
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
In series combination, charge is constant.
Now,
But
or
Now,
But
or
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
physics-General
In series combination, charge is constant.
Now,
But
or
Now,
But
or
physics
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?
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?
physicsGeneral
physics
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....
.
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....
.
physicsGeneral
