| 1 |
The diameter of a lens is called |
- A. Focal length
- B. Aperture
- C. Principle axis
- D. Centre
|
| 2 |
A layer over the central core of the jacke is called. |
- A. Jacket
- B. Plastic
- C. Cladding
- D. Rubber
|
| 3 |
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
|
| 4 |
The light signal in Opticla fiber must be regenerated by advice called. |
- A. Regenerator
- B. Generator
- C. Repeater
- D. Diode
|
| 5 |
The optical fibre is covered for protection by |
- A. Glass jacket
- B. Plastic jacket
- C. Steel jacket
- D. Diamond jacket
|
| 6 |
The speed of light was measured correctly by |
- A. Galileo
- B. Michelson
- C. Newton
- D. Maxwell
|
| 7 |
If a convex lens is used as a magnifying glass, whcih lens will give higher magnification that has. |
- A. Short size
- B. Long focal length
- C. Large size
- D. Short focal length
|
| 8 |
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
|
| 9 |
The types of optical fibres are |
- A. Three
- B. Four
- C. Five
- D. Six
|
| 10 |
The accepted value for speed of light in vacuum |
- A. 2.99 x 10<sup>8</sup>m - sec<sup>-1</sup>
- B. 2.99 x 10<sup>6</sup>m - sec<sup>-1</sup>
- C. 2.99 x 10<sup>8</sup>km - sec<sup>-1</sup>
- D. 2.99 x 10<sup>8</sup>m - h<sup>-1</sup>
|