Pole of a mirror

Q.

When a mirror is rotated through an angle θ, the reflected ray from it turns through an angle of

1. θ

2. θ/2

3. 2è

4. none of the above

Q.

Define principal axis of a spherical mirror.

Q.

Question 16
Which of the following ray diagrams is correct for the ray of light incident on a concave mirror as shown in figure 10.6?


(a) Fig. A
(b) Fig. B
(c) Fig. C
(d) Fig. D

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. Will always the rays coming from infinity parallel to the principal axis?

Q.

Define principal focus of a spherical mirror.

Q.

When an object is placed between F and C of a concave mirror, the image is formed....................

Q. Define Principle focus of a plane mirror.

Q. A concave mirror of small aperture forms a sharp image. Why?

Q.

Define the following Principal axis.

Q. Question 13
The laws of reflection hold good for

(a) plane mirror only
(b) concave mirror only
(c) convex mirror only
(d) all mirrors irrespective of their shape

Q.

Define:
(a) Radius of curvature of spherical mirror
(b) Focal length of spherical mirror.

Q. Primary focus of the concave lens lies on the left side of the optical centre of the lens.

1. False
2. True

Q.

According to the new cartesian sign convention, which of the following is taken as origin?

1. Focus

2. Centre of curvature

3. Pole of the mirror

4. Any point on the principal axis

Q. The light rays parallel to the principal axis meet at point M after passing through a convex lens. What is the power of the lens?

1. +5D
2. +0.5D
3. +2D
4. -2D

Q. The distance between principal focus and optical center of the lens is ________.

1. Focal length
2. Diameter
3. Principal axis
4. Optical center

Q. Explain the sign convention for spherical mirrors.

Q.

A ray of light incident on the optical centre of a spherical lens, after refraction passes through:

1. Principal focus

2. Optical centre

3. Radius of curvature

4. Twice the focal length

Q. Fill in the blanks :

Q. Paraxial rays meaning?

Q. The radius of curvature of a plane mirror is:

1. zero
2. negative
3. infinite
4. finite

Q. The radius of the sphere of which the reflecting surface of a spherical mirror forms a part, is called ...............

1. Centre of curvature
2. Radius of curvature
3. Focus
4. Pole

Q. Draw a ray diagram to snow the formation of image when an object is placed- (a)between pole and focus (b) at centre of curvature

Q. Question 13
The laws of reflection hold good for

(a) plane mirror only
(b) concave mirror only
(c) convex mirror only
(d) all mirrors irrespective of their shape

Q. The distance between the pole and centre of curvature of a spherical mirror is called _________ .

1. radius of curvature
2. focal length
3. object distance
4. image height

Q. Fill in the blanks:
The rays which are parallel to the principal axis of a concave mirror on reflection, meet at ____

Q. According to the new cartesian sign convention, the ________ is taken as origin

1. Centre of curvature
2. Pole of the mirror
3. Any point on the principal axis
4. Focus

Q. Fill in the blanks:
For a spherical mirror, the relation between focal length and radius of curvature is given by ____

Q. The geometrical centre of a spherical mirror is called its pole.

1. True
2. False

Q. The geometric centre of the hollow sphere of which a spherical mirror is a part is called its focal length.

1. True
2. False