Physics-
General
Easy
Question
Figure shows the graph of angle of deviation 
versus angle of incidence i for a light ray striking a prism. The prism angle is :
- 30°
- 45°
- 60°
- 75°
The correct answer is: 45°
Related Questions to study
physics-
A vertical light ray strikes a plane mirror kept inclined at an angle of 45° to the horizontal. The reflected ray is horizontal as shown in fig. A glass prism with refracting angle 6° is placed in the path of the reflected ray. In what way and by how much should the mirror be rotated, if the total deviation of the light ray is to be 90° ?
A vertical light ray strikes a plane mirror kept inclined at an angle of 45° to the horizontal. The reflected ray is horizontal as shown in fig. A glass prism with refracting angle 6° is placed in the path of the reflected ray. In what way and by how much should the mirror be rotated, if the total deviation of the light ray is to be 90° ?
physics-General
physics-
A fixed cylindrical tank of height H=4 m and area 
, is filled up with a liquid. An observer through a telescope fitted at the top of the wall of the tank and inclined at 
with the vertical. When the tank is completely filled with liquid, he notices an insect, which is at the centre of the bottom of the tank. At t=0, he opens a cork of area a at the bottom of the tank. The insect moves in such a way that it is visible for a certain time. Find the refractive indexof the liquid
A fixed cylindrical tank of height H=4 m and area , is filled up with a liquid. An observer through a telescope fitted at the top of the wall of the tank and inclined at with the vertical. When the tank is completely filled with liquid, he notices an insect, which is at the centre of the bottom of the tank. At t=0, he opens a cork of area a at the bottom of the tank. The insect moves in such a way that it is visible for a certain time. Find the refractive indexof the liquid
physics-General
physics-
A medium (M) having refractive index 2 is placed in air. Its pole is at origin. A point object at (-10 cm,0) starts moving towards the surface with velocity 
at 45° with principal axis. [R=20 cm]
Velocity of image along ' 
' direction is ___________ ms–1
A medium (M) having refractive index 2 is placed in air. Its pole is at origin. A point object at (-10 cm,0) starts moving towards the surface with velocity at 45° with principal axis. [R=20 cm]
Velocity of image along ' ' direction is ___________ ms–1
physics-General
physics-
The time required for the light to go from A to B, when a ray of light goes from point A in a medium where the speed of light is 
to a point 
in a medium where the speed of light is 
as shown in figure, is:
The time required for the light to go from A to B, when a ray of light goes from point A in a medium where the speed of light is to a point in a medium where the speed of light is as shown in figure, is:
physics-General
physics-
It is found that electromagnetic signals sent inside glass sphere from A towards B reach point C. The speed of electromagnetic signals in glass cannot be:
It is found that electromagnetic signals sent inside glass sphere from A towards B reach point C. The speed of electromagnetic signals in glass cannot be:
physics-General
physics-
In the figure ABC is the cross section of a right angled prism and BCDE is the cross section of a glass slab. The value of 
so that light incident normally on the face AB does not cross the face BC is (given 
In the figure ABC is the cross section of a right angled prism and BCDE is the cross section of a glass slab. The value of so that light incident normally on the face AB does not cross the face BC is (given
physics-General
physics-
An object is placed in front of a convex mirror at a distance of 50 cm. A plane mirror is introduced covering the lower half of the convex mirror. If the distance between the object and the plane mirror is 30 cm, it is found that there is no parallax between the images formed by the two mirrors. What is the radius of curvature of the convex mirror?
An object is placed in front of a convex mirror at a distance of 50 cm. A plane mirror is introduced covering the lower half of the convex mirror. If the distance between the object and the plane mirror is 30 cm, it is found that there is no parallax between the images formed by the two mirrors. What is the radius of curvature of the convex mirror?
physics-General
physics-
A long rectangular slab of transparent medium of thickness 'd' placed such a table with its length parallel to the x-axis and width parallel to the y-axis. A ray of light travelling in air makes a near normal
incidence on the slab as shown. Taking the point of incidence as origin (0,0,0). The refraction index 
of the medium varies as 
, where 
and r(>d) are constants. The refractive index of air is 1
The -coordinate of the point A where the ray intersects the upper surface of the slab air boundary is
A long rectangular slab of transparent medium of thickness 'd' placed such a table with its length parallel to the x-axis and width parallel to the y-axis. A ray of light travelling in air makes a near normal
incidence on the slab as shown. Taking the point of incidence as origin (0,0,0). The refraction index of the medium varies as , where and r(>d) are constants. The refractive index of air is 1
The -coordinate of the point A where the ray intersects the upper surface of the slab air boundary is
physics-General
physics-
A point source S is placed midway between two converging mirrors having equal focal length as shown in figure. Find the values of d for which only one image is formed.
A point source S is placed midway between two converging mirrors having equal focal length as shown in figure. Find the values of d for which only one image is formed.
physics-General
physics-
A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of the image.
A U-shaped wire is placed before a concave mirror having radius of curvature 20 cm as shown in figure. Find the total length of the image.
physics-General
physics-
A convex mirror of focal length 10an is shown in the figure. A linear object AB=5 cm is placed along the optic axis. Point is at a distance of 25 cm from the pole of mirror. The length of image of AB is
A convex mirror of focal length 10an is shown in the figure. A linear object AB=5 cm is placed along the optic axis. Point is at a distance of 25 cm from the pole of mirror. The length of image of AB is
physics-General
physics-
A reflecting surface is represented by the equation 
A ray travelling horizontally becomes vertical after reflection. The coordinates of the point (s) where this ray is incident is
A reflecting surface is represented by the equation A ray travelling horizontally becomes vertical after reflection. The coordinates of the point (s) where this ray is incident is
physics-General
physics-
.Two bodies A and B are moving towards a plane mirror with speeds 
and 
respectively as shown in fig. The speed of image of A respect to the body B is
.Two bodies A and B are moving towards a plane mirror with speeds and respectively as shown in fig. The speed of image of A respect to the body B is
physics-General
physics-
A point object is moving with a speed v before an arrangement of two mirrors as shown in figure. The magnitude of velocity of image in mirror 
with respected to image in mirror 
is
A point object is moving with a speed v before an arrangement of two mirrors as shown in figure. The magnitude of velocity of image in mirror with respected to image in mirror is
physics-General
physics-
A point source of light ' S ' at a distance 
from the screen A produces light intensity I0 at the centre of the screen. If a completely reflecting mirror M is placed at a distance behind the source as shown in the figure, treating object and its image as incoherent with each other, find the intensity at the centre of the screen.
A point source of light ' S ' at a distance from the screen A produces light intensity I0 at the centre of the screen. If a completely reflecting mirror M is placed at a distance behind the source as shown in the figure, treating object and its image as incoherent with each other, find the intensity at the centre of the screen.
physics-General
