Rules for Ray Diagram

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.

A point on a thin lens, through which light ray passes without any deviation is called ______________.

1. centre of curvature

2. optical centre

3. second focus

4. focus

Q.

The minimum distance between the object and the image formed by a concave mirror can be:
(f is the focal length of the mirror)

1. f

2. 2f

3. Zero

4. 4f

Q.

Light rays passing through the centre of curvature of a mirror are incident normally on the surface of the mirror.

1. False

2. True

Q. The light ray passing through the centre of curvature, after hitting the mirror will reflect at an angle of ______ with respect to the normal.

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

Q. Where is an object should be placed in a concave mirror so that image formed is highly enlarged?

1. Beyond centre of curvature
2. At centre of curvature
3. At infinity
4. At focus

Q.

When the object is kept at the centre of curvature of a concave mirror, the image size is ________________ the object size.

Q.

An object $5\mathrm{c}\mathrm{m}$ high is placed at a distance $60\mathrm{c}\mathrm{m}$ in front of a concave mirror of focal length$10\mathrm{c}\mathrm{m}$, find the size of the image.

Q.

Light rays passing through the centre of curvature of a mirror are incident normally on the surface of the mirror.

1. False

2. True

Q. A ray through the Centre of Curvature hitting the spherical mirror makes an angle of with the normal.

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

Q. Match the incident rays with the reflected rays after they reflect off a spherical mirror.

1. At focus
2. Rays retrace
3. To infinity

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. Mirrors placed facing each other would create infinite number of images all with the same size and magnification.

1. True
2. False

Q. Where is an object should be placed in a concave mirror so that image formed is highly enlarged?

1. At infinity
2. At centre of curvature
3. Beyond centre of curvature
4. At focus