1 |
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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2 |
Totally reflecting prism is used in: |
- A. periscope
- B. binoculars
- C. periscope and binocular
- D. telescope
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3 |
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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4 |
Power of convex lens is 10 D. Its focal length is: |
- A. 100 m
- B. 10 m
- C. 1 m
- D. 0.1 m
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5 |
The refractive index of air is: |
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6 |
To see from submarine the ship at the surface of water , we use: |
- A. Telescope
- B. Microscope
- C. Peri scope
- D. Prism
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7 |
The S.I unit of power of a lens is: |
- A. Dioptre
- B. Volt
- C. Ampere
- D. Watt
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8 |
The distance of image from mirror is represented by: |
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9 |
The line which passes through pole of the mirror and center of curvature is called principal: |
- A. axis
- B. Focus
- C. Line
- D. None of these
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10 |
Image formed on a camera is: |
- A. real,invertred, and diminished
- B. virtual, upright and diminshed
- C. virtual, upright and magnified
- D. real, inverted and magnified
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