| 1 |
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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| 2 |
The index of refraction depends on: |
- A. The focal length
- B. The speed of light
- C. the image distance
- D. The object distance
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| 3 |
Totally reflecting prism is used in: |
- A. periscope
- B. binoculars
- C. periscope and binocular
- D. telescope
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| 4 |
Bouncing back of light after striking the surface is called: |
- A. Refraction
- B. Reflection
- C. Diffraction
- D. Interference
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| 5 |
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
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| 6 |
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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| 7 |
When light passes through a prism it deviates from its original path due to: |
- A. Reflection
- B. Diffraction
- C. Interference
- D. Refraction
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| 8 |
Focal length for concave mirror is : |
- A. -ve
- B. +ve
- C. same
- D. none of these
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| 9 |
When the object is placed beyond 2F of a convex lens, the image formed will be: |
- A. Real, inverted and smaller than the object
- B. Real, inverted and of the same size as the object
- C. Real, inverted and larger in size than the object
- D. Virtual, erect and larger in size than the object
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| 10 |
<p class="MsoNormal">From which of the following we can get information almost
about everything:<o:p></o:p></p> |
- A. <p class="MsoNormal">Book<o:p></o:p></p>
- B. <p class="MsoNormal">Teacher<o:p></o:p></p>
- C. <p class="MsoNormal">Computer<o:p></o:p></p>
- D. <p class="MsoNormal">Internet<o:p></o:p></p>
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