| 1 |
The ability of reveal the minor details of an object under examination is called. |
- A. Resolving power
- B. Magnification
- C. Scattering
- D. Reflection
|
| 2 |
For normal adjustment what is the length of astronomical telescope if focal lengths of astronomical telescope if focal lengths of objective and eye piece are 100 cm 20 cm respectively. |
- A. 10 cm
- B. 20 cm
- C. 5 cm
- D. 120 cm
|
| 3 |
Multimode step index fibre is useful for |
- A. Long distances
- B. Short distances
- C. Better quality
- D. Low price
|
| 4 |
The light emitted from light emitting diode has wave length. |
- A. 1.1 micro meter
- B. 1.3 micro meter
- C. 1.5 micro meter
- D. 1.7 micro meter
|
| 5 |
Critical angle is that incident angle in denser medium for which angle of refraction is. |
- A. 0 <sup>o</sup>
- B. 45 <sup>o</sup>
- C. 90 <sup>o</sup>
- D. 120 <sup>o</sup>
|
| 6 |
The magnifying power of an astronomical telescope is 10. If the focal length of objective is 100 cm, then what is the focal length of eye piece. |
- A. 10 cm
- B. 100 cm
- C. 1000 cm
- D. 5 cm
|
| 7 |
Multimode graded index fibre has a core whose diameter range lie from. |
- A. 5 to 50 micro meter
- B. 50 to 100 micro meter
- C. 40 to 1000 micro meter
- D. 50 to 10,000 micrometer
|
| 8 |
The optical fiber is covered for protection by a |
- A. Glass Jacket
- B. Plastic Jacket
- C. Copper Jacket
- D. Aluminum Jacket
|
| 9 |
The first person who attempted to measure the speed of light was. |
- A. Michelson
- B. Hygen's
- C. Galileo
- D. Ability
|
| 10 |
The magnification of a convex lens of focal length 5 cm is equal to. |
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