| 1 |
The optical fiber is covered for protection by a |
- A. Glass Jacket
- B. Plastic Jacket
- C. Copper Jacket
- D. Aluminum Jacket
|
| 2 |
The minimum distance from eye at which an object appears to be distinct is |
- A. Near point
- B. Focal length
- C. Image distance from lens
- D. Object distance from lens
|
| 3 |
The light signal in Opticla fiber must be regenerated by advice called. |
- A. Regenerator
- B. Generator
- C. Repeater
- D. Diode
|
| 4 |
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
|
| 5 |
The ability of reveal the minor details of an object under examination is called. |
- A. Resolving power
- B. Magnification
- C. Scattering
- D. Reflection
|
| 6 |
If an object is placed with in the focal length of a convex lens, its image is formed. |
- A. Real
- B. Inverted
- C. Virtual
- D. Smaller than object
|
| 7 |
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>
|
| 8 |
Reapters are placed in new system at distance of. |
- A. 30 km
- B. 50 km
- C. 80 km
- D. 100 km
|
| 9 |
The units of magnifying power of microscope or telescope are. |
- A. Metre
- B. m<sup>-1</sup>
- C. dioptre
- D. No unit
|
| 10 |
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
|
