Angular Deviation

Q. A ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of ${300}^{\circ }$. The number of observable images are
(Formula for number of images is $\frac{360}{\theta }-1$, where $\theta$ is the angle between the mirrors.)

1. $15$
2. $12$
3. $13$
4. $11$

Q. Two plane mirrors are arranged as shown in the figure. A ray has been incident on one of the mirrors at an angle of ${40}^{\circ }$. The deviations produced in the incident ray after three successive reflections will be

1. ${40}^{\circ }$ clockwise
2. ${140}^{\circ }$ anticlockwise
3. ${40}^{\circ }$ anticlockwise
4. ${140}^{\circ }$ clockwise

Q. 6.A ray gets successively reflected from two mirrors inclined at 40 degree . if angle of incidence on first mirror is 30 degree then net deviation of the ray is

Q. If a ray of light is incident on a plane mirror at an angle ${60}^{\circ }$ from the mirror surface, then deviation produced by mirror is (in degree):

Q. a light ray is incident normally on one of the refracting faces of a prism and just emerges out gazing the second surface. Then, the relation between angle of prism and its critical angle is

Q. A ray of light incidents on a plane mirror at an angle ${30}^{\circ }$, calculate the angular deviation of the reflected ray.

1. ${75}^{\circ }$
2. ${120}^{\circ }$
3. ${90}^{\circ }$
4. ${60}^{\circ }$

Q. A ray of light is incident on a plane mirror at an angle ${50}^{\circ }$. The deviation produced by the plane mirror will be

1. ${70}^{\circ }$
2. ${80}^{\circ }$
3. ${120}^{\circ }$
4. ${130}^{\circ }$

Q. Find the angle of deviation for the incident ray.

1. ${60}^{\circ }$
2. ${90}^{\circ }$
3. ${135}^{\circ }$
4. ${120}^{\circ }$

Q. Two plane mirrors are inclined at an angleof 60 degree . if a light ray is incidet horizntally on 1st mirror and reflecte by2 nd mirror find the angle of deviation

Q. what will be the deviation produced when the ray of light is incident on a plane mirror at an angle of incidence 60 degre?e

Q. Choose the correct option for the given assertion and reason.
Assertion: Two plane mirrors kept at right angle deviate any ray of light by ${180}^{\circ }$ after two successive reflections.
Reason: The above condition is satisfied only for angle of incidence, $i={45}^{\circ }$.

1. Assertion and reason both are correct and reason is the correct explanation of assertion.
2. Assertion and reason both are correct and reason is not a correct explanation of assertion.
3. Assertion is correct, but reason is not correct.
4. Assertion is not correct, but reason is correct.

Q.

A double slit $S_1-S_2$ is illuminated by a coherent ight of wavelength \lambda the slits are separated by a distance d. A plane mirror is placed in front of the double slit at a distance $D_1$ from it and a screen $\sum$ is placed behind the double slit at a distance $D_2$ from it (figure 17 - E2). The screen $\sum$ receives only the light reflected by the mirror. Find the fringe -width fo te interference pattern on the screen.

Q. A ray of light is incident on the plane mirror at an angle of incidence of 45 degree. The deviation produced i

Q. A ray of light is incident on a horizontal plane mirror at an angle of incidence ${30}^o$. By what angle should the mirror be rotated so that the reflected ray becomes horizontal?

Q. Find the net angle of deviation if the angle of incidence is ${30}^{\circ }$ as shown in the figure.

1. ${120}^{\circ }$ clockwise
2. ${270}^{\circ }$ clockwise
3. ${90}^{\circ }$ anticlockwise
4. ${180}^{\circ }$ clockwise

Q. Two plane mirrors arr incliner at each other at an obtuse angle θ.A ray of light is reflected at one mirror then at other.The net deviation produced i

Q. A ray of light incident on a transparent sphere at an angle $\pi /4$ and refracted at an angle r, emerges from the sphere after suffering one internal reflection. The total angle of deviation of the ray is$?$

1. $\frac{\pi }{4}-r$
2. $\frac{\pi }{2}-4r$
3. $\frac{5\pi }{2}-4r$
4. $\frac{3\pi }{2}-4r$

Q.

The angle between the incident and reflected rays is ${90}^o$. If the plane mirror is rotated by ${10}^o$ about O in the anti-clockwise direction in the plane perpendicular to the mirror, then the angle between the incident and reflected rays will be _______${}^0$.

1. 70
2. 80
3. 90
4. 110
5. 100

Q. If a ray of light is incident on a plane mirror at an angle ${60}^{\circ }$ with the mirror surface, then deviation produced by mirror (in degrees) is (Give integer value)

Q. If a ray of light is incident on a plane mirror at an angle ${60}^{\circ }$ with the mirror surface, then deviation produced by mirror (in degrees) is (Give integer value)

Q. Calculate the deviation suffered by a ray which is incident on a plane horizontal mirror at an angle of ${60}^o$ to the normal

1. ${120}^o$
2. ${90}^o$
3. ${60}^o$
4. ${45}^o$

Q. A ray of light is incident on a plane mirror at an angle of ${30}^{\circ }$ with its normal. The deviation produced in the ray is

1. ${60}^{\circ }$
2. ${120}^{\circ }$
3. ${90}^{\circ }$
4. ${30}^{\circ }$

Q. A ray reflected successively from two plane mirrors inclined at a certain angle undergoes a deviation of ${300}^{\circ }$. The number of observable images are :

1. $15$
2. $12$
3. $11$
4. $13$

Q. a light ray is incident normally on one of the refracting faces of a prism and just emerges out gazing the second surface. Then, the relation between angle of prism and its critical angle is

Q. A ray of light incident on the plane mirror at incidence angle 50 degree what will be the deviation of the light ray.

Q. A point source of light is placed in front of a plane mirror as shown in the fig. Determine the length of reflected path of light on the screen ($\sum$).

1. $2L$
2. $L$
3. $\frac{3L}{2}$
4. $\frac{L}{2}$

Q. If a ray of light is incident on a plane mirror at an angle 55 then what is the deviation produced by the plane mirror?

Q. Why the angle of incidence must not be less then ${30}^o$ while calculating angle of minimum deviation?

Q. What is the maximum angle of deviation possible for a ray incident on a plane mirror ?

Q.

a ray of light falls on a plane mirror. when the mirror is rotated by 20 degrees, the angle between the incident ray and reflected ray is 45 degrees. the original angle between incident ray and reflected ray is ?