| 1 |
Snell' law is: |
- A. n = sin<x/sin <r
- B. n=sin <i/sin<r
- C. n = sin <r/sin<i
- D. <i/<r
|
| 2 |
Totally reflecting prism turns the incident ray at an angle of: |
- A. 90<sup>o</sup>
- B. 60<sup>o</sup>
- C. 75<sup>o</sup>
- D. 45<sup>o</sup>
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| 3 |
After refraction from a convex lens, rays of light parallel to the principal axis converge at a point, this point of convex lens is called: |
- A. Principal focus
- B. Pole
- C. Focal length
- D. Optical center
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| 4 |
<p class="MsoNormal">Which is an example of a longitudinal wave:<o:p></o:p></p> |
- A. <p class="MsoNormal">Sound wave<o:p></o:p></p>
- B. <p class="MsoNormal">Light wave<o:p></o:p></p>
- C. <p class="MsoNormal">Radio wave<o:p></o:p></p>
- D. <p class="MsoNormal">Water wave<o:p></o:p></p>
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| 5 |
<p class="MsoNormal">The data stored in C.D is:<o:p></o:p></p> |
- A. <p class="MsoNormal">680 MB<o:p></o:p></p>
- B. <p class="MsoNormal">650 MB<o:p></o:p></p>
- C. <p class="MsoNormal">700 MB<o:p></o:p></p>
- D. <p class="MsoNormal">750 MB<o:p></o:p></p>
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| 6 |
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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| 7 |
The ray of the light after reflection from concave mirror passes through: |
- A. Centre
- B. Principal focus
- C. Pole
- D. None of these
|
| 8 |
The mirror whose inner surface is reflecting is called: |
- A. Concave mirror
- B. Convex mirror
- C. Miroor
- D. Lens
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| 9 |
<p class="MsoNormal">Hard disk is made of:<o:p></o:p></p> |
- A. <p class="MsoNormal">Aluminium<o:p></o:p></p>
- B. <p class="MsoNormal">Copper<o:p></o:p></p>
- C. <p class="MsoNormal">Iron<o:p></o:p></p>
- D. <p class="MsoNormal">Plastic<o:p></o:p></p>
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| 10 |
If a ray of light is glass is incident on an air surface at an angle greater than the critical angle, the ray will. |
- A. refract only
- B. reflect only
- C. partially refract and partially reflect
- D. Diffract only
|