| 1 |
The optical fiber is covered for protection by a |
- A. Glass Jacket
- B. Plastic Jacket
- C. Copper Jacket
- D. Aluminum Jacket
|
| 2 |
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>
|
| 3 |
In Michelson's experiment the relation used to find the speed of light is |
- A. 16 fc
- B. 1/16 fd
- C. 16 fd
- D. 16/fd
|
| 4 |
Total confined light is obtained by |
- A. Total internal reflection
- B. Refraction of light
- C. Diffraction
- D. Polarization
|
| 5 |
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
|
| 6 |
Multimode step index fibre is useful for |
- A. Long distances
- B. Short distances
- C. Better quality
- D. Low price
|
| 7 |
In an object is placed in between focus point and Opticla center of a convex lens, the image formed by lens is. |
- A. Real inverted
- B. Virtual diminshed
- C. Virtual inverted
- D. Virtual erected
|
| 8 |
__ will travel faster than other through an optical fibre. |
- A. Ultraviolet light
- B. Visible light
- C. Infrared light
- D. White light
|
| 9 |
The focal length of a concave lens is always |
- A. +ve
- B. -ve
- C. Zero
- D. None of these
|
| 10 |
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
|
