- 1(current)
Q. No.In image formation from spherical mirrors, only paraxial rays are considered because they
1. are easy to handle geometrically
2. contain most of the intensity of the incident light
3. form nearly a point image of a point source
4. show minimum dispersion effect
A point object is placed at a distance of 30 cm from a convex mirror of focal length 30 cm. The image will form at
1. infinity
2. pole
3. focus
4. 15 cm behind the mirror
The image formed by a concave mirror:
| 1. | is always real |
| 2. | is always virtual |
| 3. | is certainly real if the object is virtual |
| 4. | is certainly virtual if the object is real |
Mark the correct options:
| 1. | if the incident rays are converging, we have a real object. |
| 2. | if the final rays are converging, we have a real image. |
| 3. | the image of a virtual object is called a virtual image. |
| 4. | if the image is virtual, the corresponding object is called a virtual object. |
Which of the following (referred to a spherical mirror) do (does) not depend on whether the rays are paraxial or not?
(a) pole
(b) focus
(c) radius of curvature
(d) principal axis
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (a), (b) and (c)
4. (a), (c) and (d)
The image of an extended object, placed perpendicular to the principal axis of a mirror, will be erect if
(a) the object and the image are both real
(b) the object and the image are both virtual
(c) the object is real but the image is virtual
(d) the object is virtual but the image is real
Choose the correct option:
1. (a) and (b)
2. (b) and (c)
3. (c) and (d)
4. (a) and (d)
- 1(current)
Q. No.
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