| 1 |
The magnification of a convex lens of focal length 5 cm is equal to. |
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| 2 |
Information carrying capacity of optical fibre called. |
- A. Capacity
- B. Band width
- C. Immunity
- D. Ability
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| 3 |
Using a graded Index fibre, the time difference is reduced to about. |
- A. 1 ns per km
- B. 33 ns per 100 km
- C. 33 ns per km
- D. 1 ns per 100 km
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| 4 |
The optical fiber is covered for protection by a |
- A. Glass Jacket
- B. Plastic Jacket
- C. Copper Jacket
- D. Aluminum Jacket
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| 5 |
Critical angle is that angle of incident ofr which angle of refraction is. |
- A. 90 <sup>o</sup>
- B. 45 <sup>o</sup>
- C. 42 <sup>o</sup>
- D. 24 <sup>o</sup>
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| 6 |
The magnifying power is also called |
- A. Resolving power
- B. Angular magnification
- C. Strength of eye
- D. None of these
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| 7 |
Multimode step index fibre is useful for |
- A. Long distances
- B. Short distances
- C. Better quality
- D. Low price
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| 8 |
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
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| 9 |
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>
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| 10 |
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>
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