| 1 |
The diameter of a lens is called |
- A. Focal length
- B. Aperture
- C. Principle axis
- D. Centre
|
| 2 |
Information carrying capacity of optical fibre called. |
- A. Capacity
- B. Band width
- C. Immunity
- D. Ability
|
| 3 |
Multimode step index fibre is useful for |
- A. Long distances
- B. Short distances
- C. Better quality
- D. Low price
|
| 4 |
Image formed by a concave lens is |
- A. Real
- B. Virtual
- C. Erect
- D. None of these
|
| 5 |
If an object lies at focus point F in front of a converd lens, its image is formed at. |
- A. 2F
- B. F
- C. 3F
- D. Infinity
|
| 6 |
A layer over the central core of the jacke is called. |
- A. Jacket
- B. Plastic
- C. Cladding
- D. Rubber
|
| 7 |
A double convex lens acts as diverging lens when the object is |
- A. At infinity
- B. Inside the focus
- C. A way from focus
- D. A a large distance from lens
|
| 8 |
The types of optical fibres are |
- A. Three
- B. Four
- C. Five
- D. Six
|
| 9 |
A convex lens acts as diverging lens if the object is placed at |
- A. F
- B. 2F
- C. Between F and 2 F
- D. Within the F
|
| 10 |
The least distance of distinct vision for the normal eye is. |
- A. 15 cm
- B. 25 cm
- C. 125 cm
- D. 25 m
|
