Physics-
General
Easy
Question
A ray of light strikes a plane mirror at an angle of incidence 
as shown in the figure. After reflection, the ray passes through a prism of refractive index 1.50, whose apex angle is 
. The angle through which the mirror should be rotated if the total deviation of the ray is to be 
is :
- 10 clockwise
- 10 anticlockwise
- 20 clockwise
- 20 anticlockwise
The correct answer is: 10 anticlockwise
Related Questions to study
physics-
A beam of white light is incident on hollow prism of glass as shown in figure. Then :
A beam of white light is incident on hollow prism of glass as shown in figure. Then :
physics-General
physics-
Two plano-convex lenses each of focal length 10 cm & refractive index 3/2 are placed as shown in the figure. In the space left, water 
is filled. The whole arrangement is in air. The optical power of the system is (in dioptre):
Two plano-convex lenses each of focal length 10 cm & refractive index 3/2 are placed as shown in the figure. In the space left, water is filled. The whole arrangement is in air. The optical power of the system is (in dioptre):
physics-General
physics-
What should be the value of distance d so that final image is formed on the object itself. (focal lengths of the lenses are as given in the figure).
What should be the value of distance d so that final image is formed on the object itself. (focal lengths of the lenses are as given in the figure).
physics-General
physics-
In the figure given below, there are two convex lens 
and 
having focal length of 
and 
respectively. The distance between and will be
In the figure given below, there are two convex lens and having focal length of and respectively. The distance between and will be
physics-General
physics-
A thin symmetrical double convex lens of power P is cut into three parts, as shown in the figure. Power of A is:
A thin symmetrical double convex lens of power P is cut into three parts, as shown in the figure. Power of A is:
physics-General
physics-
A beam of diameter ‘ d ‘ is incident on a glass hemisphere as shown in the figure. If the radius of curvature of the hemisphere is very large in comparison to d, then the diameter of the beam at the base of the hemisphere will be:
A beam of diameter ‘ d ‘ is incident on a glass hemisphere as shown in the figure. If the radius of curvature of the hemisphere is very large in comparison to d, then the diameter of the beam at the base of the hemisphere will be:
physics-General
physics-
The image for the converging beam after refraction through the curved surface (in the given figure) is formed at:
The image for the converging beam after refraction through the curved surface (in the given figure) is formed at:
physics-General
physics-
In the given figure a plano-concave lens is placed on a paper on which a flower is drawn. How far above its actual position does the flower appear to be ?
In the given figure a plano-concave lens is placed on a paper on which a flower is drawn. How far above its actual position does the flower appear to be ?
physics-General
physics-
A prism having an apex angle of 40 and refractive index of 1.50 is located in front of a vertical plane mirror as shown in the figure. A horizontal ray of light is incident on the prism. The total angle through which the ray is deviated is:
A prism having an apex angle of 40 and refractive index of 1.50 is located in front of a vertical plane mirror as shown in the figure. A horizontal ray of light is incident on the prism. The total angle through which the ray is deviated is:
physics-General
physics-
Given that, velocity of light in quartz = 
m/s and velocity of light in glycerine = 
. Now a slab made of quartz is placed in glycerine as shown. The shift of the object produced by slab is
Given that, velocity of light in quartz = m/s and velocity of light in glycerine = . Now a slab made of quartz is placed in glycerine as shown. The shift of the object produced by slab is
physics-General
physics-
A beam of light is converging towards a point. A plane parallel plate of glass of thickness t, refractive index m is introduced in the path of the beam as shown in the figure. The convergent point is shifted by (assume near normal incidence):
A beam of light is converging towards a point. A plane parallel plate of glass of thickness t, refractive index m is introduced in the path of the beam as shown in the figure. The convergent point is shifted by (assume near normal incidence):
physics-General
physics-
AZ ray of light travelling in air is incident at grazing incidence on a slab with variable refractive index 
where 
and follows path as shown in the figure. What is the total deviation produced by slab when the ray comes out
AZ ray of light travelling in air is incident at grazing incidence on a slab with variable refractive index where and follows path as shown in the figure. What is the total deviation produced by slab when the ray comes out
physics-General
physics-
In the figure shown find the total magnification after two successive reflections first on 
and then on 
.
In the figure shown find the total magnification after two successive reflections first on and then on .
physics-General
physics-
A square ABCD of side 1mm is kept at distance 15 cm infront of the concave mirror as shown in the figure. The focal length of the mirror is 10 cm. The length of the perimeter of its image will be (nearly):
A square ABCD of side 1mm is kept at distance 15 cm infront of the concave mirror as shown in the figure. The focal length of the mirror is 10 cm. The length of the perimeter of its image will be (nearly):
physics-General
physics-
Two mirrors are inclined at an angle q as shown in the figure. Light ray is incident parallel to one of the mirrors. Light will start retracing its path after third reflection if
Two mirrors are inclined at an angle q as shown in the figure. Light ray is incident parallel to one of the mirrors. Light will start retracing its path after third reflection if
physics-General
