Reflection

Q.

Define an angle of reflection.

Q. A man 180cm high stands in front of a plane mirror. His eyes and at the height of 172cm from the floor. Then to see his full image for minimum length of mirror, the lower end of the mirror should be placed at a height of A)86 cm from the floor B) 94cm from the floor C) 4cm from the floor D) 8 cm from the floor

Q. Find the value of the angle of reflection when an incident ray makes an angle of 40° with the plane mirror

Q.

give the angle of incidence and angle of reflection for normal incidence

Q. A plane mirror is placed at a distance of 12.5 cm from the focus of a concave mirror of radius of curvature 20 cm. find where an object can be placed between the two mirrors, so that the first image in both of the mirrors coincide?

Q. To get an image of the same size as the object in a concave mirror, the object should be placed at the of the mirror.

1. centre of curvature
2. focus
3. pole

Q.

Images formed by totally reflected light are brighter than the images formed by ordinary reflected light. Why?

Q. What do you mean by 'Reflection of light'? State the laws of reflection.

Q. Which component of the mirror reflects the light?

1. Front side of glass
2. Silver polishing
3. Opaque paint at the back
4. Back side of glass

Q.

A diver in a swimming pool wants to signal his distress to a person lying on the edge of the pool by flashing his water proof flash light

1. He must direct the beam vertically upwards

2. He has to direct the beam horizontally

3. He has to direct the beam at an angle to the vertical which is slightly less than the critical angle of incidence for total internal reflection

4. He has to direct the beam at an angle to the vertical which is slightly more than the critical angle of incidence for the total internal reflection

Q.

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

1. Angle of incidence > Angle of reflection.

2. Angle of incidence < Angle of reflection.

3. There is no relationship between angle of incidence and angle of reflection.

4. Angle of incidence = Angle of reflection.

Q.

Statement 1 : Angle of incidence is always equal to the angle of reflection.

Statement 2: Angle of incidence is always twice the angle of reflection.

Statement 3: The incident ray reflected ray and the normal all lie in 3 different planes.

Statement 4: The incidence ray reflected ray and the normal all lie in the same plane.

Which of the statements refer to the laws of reflection?

1. 1 & 4

2. 2 & 3

3. 1 & 3

4. 2 & 4

Q.

Imaginary line perpendicular to the mirror is called ________

Q.

A light ray falling on a reflecting surface is called a reflected ray.

1. True
2. False

Q.

Define angle of reflection

Q.

What is a reflected ray?

Q. . Two plane mirrors A and B are parallel to each other and spaced 26 cm apart. An object is placed in between them at 9 cm from A. Out of the following at which point an image is not formed in mirror A (Distance measured from mirror A):-

Q. How many no of images of a person is formed who is in a room whose two adjacent walls and ceiling are plane mirrors

Q.

You are provided with a concave mirror, a convex mirror, and a plane mirror. How will you distinguish between them, without touching or using any apparatus?

Q.

Do a transparent sustace reflects light ? How?

As transparent substance refracts light . But we see a transparent substance

Q. How does regular reflection gives rise to image formation ? How does irregular reflection or diffused reflection makes the things visible around us ?

Q. A light ray is incident on a plane mirror with ${30}^o$ angle of incidence. What will be the angle of reflection?

Q.

When you use the hollow side of a hollow sphere to make reflections you get a ___ mirror.

Q. What would happen to the image formed if you remove the mirror from a compound microscope?

1. It will be sharper.
2. It will be larger.
3. It won't be formed at all.
4. It will be inverted.

Q. Question 3
Under which of the conditions a concave mirror can form a real image larger than the actual object?

(a) When the object is kept at a distance equal to its radius of curvature.
(b) When object is kept at a distance less than its focal length.
(c) When object is placed between the focus and centre of curvature.
(d) When object is kept at a distance greater than its radius of curvature.

Q.

A ray of light strikes a plane mirror such that angle with the mirror is 25 degree. What is the value of the angle of reflection? What is the angle between the incident ray and the reflected ray.

Q. What is sign convention of mirror?

Q.

The phenomenon of light hitting a surface and then bouncing off is termed as ___ .

Q.

A ray Of light makes an angle of 10° with the horizontal and strikes a plane mirror which is inclined at an angle to the horizontal. The angle r for which reflected ray becomes vertical is what