| 1 |
The critical angle for glass to: |
- A. 24<sup>o</sup>
- B. 48<sup>o</sup>
- C. 42<sup>o</sup>
- D. 50<sup>o</sup>
|
| 2 |
The mirror whose outer surface is reflecting is called: |
- A. Concave mirror
- B. Convex mirror
- C. Lens
- D. Mirror
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| 3 |
Snell' law is: |
- A. n = sin<x/sin <r
- B. n=sin <i/sin<r
- C. n = sin <r/sin<i
- D. <i/<r
|
| 4 |
Optical fibre are: |
- A. Cheap
- B. Flexible
- C. Lighter
- D. All of these
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| 5 |
Critical angle for diamond is: |
- A. 60<sup>o</sup>
- B. 24<sup>o</sup>
- C. 26<sup>o</sup>
- D. 49<sup>o</sup>
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| 6 |
When a ray of light enters from denser medium to rare medium, the angle of incidence for which angle of refraction is 90<sup>o</sup> is called: |
- A. angle of incidence
- B. critical angle
- C. angle of refrection
- D. None of these
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| 7 |
An object of placed at he centre of curvature of a concave mirror. The image produced by the mirror is located: |
- A. out beyond the centre of curvature.
- B. at the centre of curvature
- C. between the centre of curvature and the focal point
- D. at the focal point
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| 8 |
<p class="MsoNormal">A device which has two ways communication is:<o:p></o:p></p> |
- A. <p class="MsoNormal">Television<o:p></o:p></p>
- B. <p class="MsoNormal">Radio<o:p></o:p></p>
- C. <p class="MsoNormal">Hard disk<o:p></o:p></p>
- D. <p class="MsoNormal">Mobile phone<o:p></o:p></p>
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| 9 |
The ray of light striking to the side of prism is called: |
- A. refraction ray
- B. incident ray
- C. reflected ray
- D. emergent ray
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| 10 |
<p class="MsoNormal">The distance between two consecutive waves compressions or
rarefactions is called:<o:p></o:p></p> |
- A. <p class="MsoNormal">Focal length<o:p></o:p></p>
- B. <p class="MsoNormal">Wave length<o:p></o:p></p>
- C. <p class="MsoNormal">Frequency<o:p></o:p></p>
- D. <p class="MsoNormal">Time period<o:p></o:p></p>
|