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The part of the lens through which the r...

The part of the lens through which the ray of light passes without suffering deviation is called _________.

A

focus

B

centre of curvature

C

Pole

D

optic centre

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The correct Answer is:
D
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SURA PUBLICATION-OPTICS-ADDITIONAL QUESTIONS & ANSWER (Choose the Correct Answer)
  1. A concave lens is a .

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  2. In spherical lenses, all distance are measured from .

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  3. The part of the lens through which the ray of light passes without suf...

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  4. Convex lens always forms a real image , if the object is situated beyo...

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  5. A convex lens forms a virtual image, if the object is

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  6. The image formation by spherical lenses is due to the phenomenon of .

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  7. According to snell's law,

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  8. When a ray of light entes glass from water, it bends .

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  9. Where should an object be placed so that a real and inverted image of ...

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  10. The point at which the principal axis meets the surface of the lens is...

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  11. When a person uses a convex lens as a simple magnifying glass, the ob...

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  12. The distance between the lens and focus is called .

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  13. Highly enlarged image is obtained by convex lens when object is at .

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  14. Convex lens forms a highly diminished , real and inverted image, an ob...

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  15. Convex lenses are used in .

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  16. Real images formed by convex lenses are always .

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  17. An object is placed at 12 cm from a convex lens whose focal length is ...

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  18. The image produced by a concave lens is .

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  19. An object is placed 25 cm from a convex lens whose focal length is 10 ...

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  20. Magnificatio produced by a lens is

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