| 1 |
The ratio of image height to object height is called: |
- A. Linear magnification
- B. Power
- C. Refraction
- D. Radius of curative
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| 2 |
The point through which rays of light pass after reflection from concave mirror is called principal: |
- A. Focus
- B. Circle
- C. Axis
- D. Radius
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| 3 |
Which types of image is produced by the converging lens of human eye if it view a distant object? |
- A. Real , erect, same size
- B. Real, inverted, diminshed
- C. Virtual, erect,diminshed
- D. Virtual, inverted, magnified
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| 4 |
<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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| 5 |
____________ is always virtual in case of convex mirror. |
- A. p
- B. image
- C. object
- D. all of these
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| 6 |
Bouncing back of light after striking the surface is called: |
- A. Refraction
- B. Reflection
- C. Diffraction
- D. Interference
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| 7 |
The totally reflectiing prism one angle is of: |
- A. 45<sup>o</sup>
- B. 90<sup>o</sup>
- C. 180<sup>o</sup>
- D. 120<sup>o</sup>
|
| 8 |
Concave mirror formula is given by: |
- A. R = 2r
- B. sin<i/sin<r
- C. 1/f=1/p+1/q
- D. 1/f=1/p-1/q
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| 9 |
Optical fibers work on the principle of: |
- A. Refraction
- B. Reflection
- C. Total internal reflection
- D. Diffraction
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| 10 |
The refractive index of internal coating of optical fibre is: |
- A. 1.56
- B. 1.51
- C. 1.53
- D. 1.58
|