Field of View of Mirrors and Nature of Images

Q.

What is the difference between focus and principal focus of concave and convex lenses

Q.

Why image is formed at focus when object is placed at infinity?

Q. After reflection, a ray directed towards the focus of a convex mirror emerges perpendicular to the principal axis.

1. True
2. False

Q.

FOCUS :focus also called an image point, is the point where light rays originating from a point on the object converge..

BUT, when the object is kept beyond the centre of curvature then rays converge between centre of curvature and the point focus. So now that point CAN BE called as the FOCUS.

Q.

Which of the following mirror has the highest field of view?

1. 

2. 

3. 

4. 

Q.

The light ray parallel to the principal axis will:-

1. pass through C

2. pass through F

3. appear to come from F

4. appear to come from C

Q. A ray of light becomes parallel to the principal axis after reflection from a concave mirror. Which of the following can be concluded regarding the incident ray?

1. It must pass through the centre of curvature.
2. It must pass through the focus.
3. It must be parallel to the principal axis.
4. It must incident on the pole.

Q.

A real image is formed when two or more

1. reflected rays meet

2. refracted rays do not meet

3. reflected rays appear to meet

4. none of these

Q. Identify the mirror which is small in size, but can form a full virtual image of a tall building?

1. Concave mirror
2. Plane mirror
3. A combination of concave and plane mirror
4. A convex mirror

Q. Which of the following can be used to focus a parallel beam of light onto a point?

1. Convex mirror
2. Plane mirror
3. Concave mirror
4. Concave lens

Q. Question 4
A spherical mirror and a thin spherical lens have each a focal length of -15 cm. The mirror and the lens are likely to be

(a) both concave
(b) both convex
(c) the mirror is concave and the lens is convex
(d) the mirror is convex, but the lens is concave

Q.

Which of the following relations hold good?

1. R = F

2. R = $\frac{F}{2}$

3. F = $\frac{R}{2}$

4. 2F = R

Q. A light ray passing through the focus is incident on a concave mirror. It is reflected parallel to the principal axis.

1. True
2. False

Q. when the light rays passes through the convex mirror, why does the reflected ray pass outward or moves away from the principle of focus

Q. Distance between focus and centre of curvature is equal to .

1. height of the mirror
2. half of the radius
3. radius of curvature

Q.

Differentiate between real and virtual images.

Q.

Sir

I am Shaun job of class 10 I have a doubt in physics on the topic of optics, this is the question Sir

What is the field of view of a mirror, is it measured in terms of its area? How does a convex mirror create a wider field of view?how can we prove that a convex mirror creates a wider field of view?

Thank you for your time Sir

Shaun

Q. Define the radius of curvature of a spherical mirror.
If the radius of curvature of a spherical mirror is 20 cm, what is its focal length? [2 Mark]

Q. Incident ray starting or passing through the focus of a concave mirror travels parallel to its principal axis after reflection.

1. True
2. False

Q. A ray parallel to the principal axis is incident on a concave mirror. After reflection which point corresponding to the mirror the ray should pass through ?

1. Focus
2. Centre of curvature
3. The ray will retrace its path
4. Pole

Q.

An image which is not formed on the screen is known as ___________.

1. real image

2. virtual image

3. magnified image

4. diminished image

Q.

Sunlight is incident on a concave mirror parallel to its principal axis. The image of the sun is formed 15 cm from the pole. Calculate the radius of curvature of the mirror.

Q. A small bulb is placed at the focal point of a converging lens. When the bulb is switched on, the lens produces:

(a) a convergent beam of light
(b) a divergent beam of light
(c) a parallel beam of light
(d) a patch of coloured light

Q.

Which of the following mirrors has the widest field of view?

1. Convex mirror

2. Concave mirror

3. Plane mirror

4. Concave lens

Q.

No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be:

1. Plane.

2. Concave.

3. Convex.

4. Either plane or convex.

Q.

Differential between the following

Real image and Virtual image

Q.

A ray of light falling parallel to the principal axis on a convex mirror follows which of the following path?

1. 1

2. 2

3. 3

4. 4

Q. The line joining the centre of curvature and the ___ of the mirror is called the principal axis

1. pole
2. focus
3. radius
4. point of incidence

Q. Distance between focus and centre of curvature is equal to ___.

1. half of radius of curvature
2. height of the mirror
3. radius of curvature
4. object distance

Q. The parallel rays of light after passing through a convex lens converge at:

1. Principal focus
2. Infinity
3. Centre of curvature
4. Optical centre