Laws of Reflection

Q.

If the angle of incidence is 30${}^{\circ }$, then the angle of reflection will be

1. 30^o

2. 60^o

3. 0^o

4. 90^o

Q.

A ray of light is incident on a plane mirror and the angle of reflection is 50 degrees. Calculate the angle between the incident ray and the reflected ray.

1. 50 degree

2. 25 degree

3. 0 degree

4. 100 degree

Q.

Define glancing angle.

Q. What is the relationship between angle of incidence and angle of reflection?

1. Angle of incidence > Angle of reflection.
2. Angle of incidence < Angle of reflection.
3. Angle of incidence = Angle of reflection.
4. There is no relationship between angle of incidence and angle of reflection.

Q. Laws of reflection do not hold true for diffused reflection because the reflected rays go into arbitrary directions.

1. True
2. False

Q.

If the angle of incidence is 60 degree for an incident ray on a surface, then what is the angle of reflection?

1. 45 degree

2. 30 degree

3. 60 degree

4. 90 degree

Q. What will be the angle of reflection if a ray of light strikes the mirror normally?

1. $0^{\circ }$
2. ${45}^{\circ }$
3. ${180}^{\circ }$
4. ${90}^{\circ }$

Q.

Which law does reflection from a spherical mirror follow?

Q.

If the angle of incidence is $35$ degrees, what is the angle between the incident and the reflected rays?

1. $90$

2. $100$

3. $70$

4. none of the above

Q.

We are able to see objects because:

1. our eye is a source of light

2. light originates from some objects

3. light gets bounced back from some objects

4. both B and C

Q. If the incident ray makes an angle of ${55}^{\circ }$ with the normal, what angle would the reflected ray make with normal?

1. ${60}^{\circ }$
2. ${45}^{\circ }$
3. ${55}^{\circ }$
4. ${80}^{\circ }$

Q. Which of the following statement(s) is/are correct according to the laws of reflection?

1. Angle of incidence is equal to the angle of reflection.

2. Difference of the angle of incidence and the angle of reflection is ${90}^{\circ }$.

3. The incident ray, the normal and the reflected ray all lie in the same plane.

4. The incident ray, the normal and the reflected ray lie in perpendicular planes.

Q.

The angle of incidence is greater than the angle of reflection in diffused reflection.

1. True
2. False

Q. The incident ray, the reflected ray and the normal at the point of incidence _________.

1. lie in the different planes
2. lie in planes that are mutually perpendicular to each other
3. lie in planes that are parallel to each other
4. lie in the same plane

Q.

If the angle between the plane mirror and the incident ray is 40°, what are the angles of incidence and reflection?

Q.

Define: Angle of reflection

Q. What is the value of the unknown angle $\left(\theta \right)$ in the following diagram?

1. ${90}^{\circ }$
2. ${45}^{\circ }$
3. ${60}^{\circ }$
4. ${30}^{\circ }$

Q. If a beam of parallel rays fall on a smooth reflecting surface, then the beam of reflected rays are:

1. Inclined to each other.
2. Parallel to incident rays.
3. Parallel to each other.
4. Perpendicular to each other.

Q. Which of these diagrams correctly shows how a ray of light gets reflected?

1. 
2. 
3. 
4. 

Q. A plane mirror lies face up making an angle of 15degree with horizontal . a ray shines down vertically on the mirror.what is the angle of incidence? What will the angle between the reflected ray and the horizontal line?

Q.

What will be the angle of reflection if a ray of light strikes a plane mirror normally?

1. ${180}^{\circ }$

2. ${90}^{\circ }$

3. $0^{\circ }$

4. None of these

Q.

Under what condition in an arrangement of two plane mirrors, incident ray and reflected ray will always be parallel to each other, whatever may be the angle of incidence. Show the same with the help of a diagram.

Q. If the angle of incidence is equal to 30 degrees, the angle of reflection will be equal to ______.

1. 30 degrees
2. 0 degree
3. 15 degrees
4. 45 degrees

Q.

The reflection of light from a given surface depends upon which of the following factor(s)?

1. Both A and B

2. Dimension of the surface

3. Material of the surface

4. Nature of the surface

Q.

In the below figure, the angle of reflection is

1. 30 degree

2. 90 degree

3. Insufficient data

4. 60 degree

Q.

Match the following:

Column 1	Column 2
Light ray that bounces back from the mirror.	laterally inverted
Left side of an object appears to be the right side.	primary colours
Angle between the incident ray and the normal	angle of reflection
Angle between the reflected ray and the normal.	reflected ray
Red, green and blue colours	angle of incidence

Q. The light ray that reaches our eye after reflection is known as ______.

1. incident ray
2. reflected ray
3. normal ray
4. diverging ray

Q.

Which of the rays are in the same plane?

1. Incident ray

2. Reflected ray

3. Normal

4. Emergent ray

Q. A ray of light is incident at ${60}^{\circ }$, on glass-air interface. Then the light ray will ___. (Given: Incident ray lies in glass).
Use : [${\mu }_g$ = $\sqrt{2}$ , ${\mu }_a$ = 1]

1. pass undeviated

2. reflect back into glass

3. refract at ${90}^{\circ }$ to the normal

4. refract at ${60}^{\circ }$ to the normal

Q.

Look at the given figure -

Select the correct option(s) from the following?

1. AO is known as the reflected ray

2. OB is known as the normal

3. ON is known as the normal

4. AO is known as the incident ray