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The defect of vision which cannot be cor...

The defect of vision which cannot be corrected by using spectacles is :

A

Myopia

B

presbyopia cataract

C

cataract

D

hypermetropia

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Name any two defects of vision which can be corrected by using spectacles.

Name the defect of vision which can be corrected by a diverging lens. Show clearly by a ray diagram how the lens corrects the defect.

Name one defect of vision (or eye) which cannot be corrected by any type of spectacle lenses.

Name the defect of vision which can ne corrected by a converging lens. Show clearly by a ray diagram how the lens corrects the defect.

A person finds difficulty in seeing nearby objects clearly. His vision can be corrected by using spectacles containing :

A person cannot see distant objects clearly. His vision can be corrected by using the spectacles containing :

Which defect of vision can be rectified : (a) by using a concave lens ? (b) by using a convex lens ?

MBD -HARYANA BOARD-LIGHT:REFLECTION AND REFRACTION-EXAMPLE
  1. Define one dioptre.

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  2. What is the nature of the mirror having focal length - 15 cm?

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  3. A mirror has magnification 0.4, What type of the mirror is and what ty...

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  4. A ray strikes the mirror normally, what is the angle of incidence?

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  5. The power of a lens is +2.0D. Its focal length should be:

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  6. Nature of image of a real object formed by convex mirror is always

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  7. The mirrors used as rear-view mirrors in vehicles are

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  8. sin i / sin r relation was given by …………

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  9. The focal length of a lens is expressed by which of the following:

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  10. The relation between the radius of curvature ® and focal length (f) of...

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  11. The unit of power of a lens is

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  12. Power of a lens is -5d, its focal length is:

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  13. Shaving mirrors are

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  14. Twinkling of stars is due to atmospheric

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  15. The defect of vision which cannot be corrected by using spectacles is ...

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  16. Which one of the following materials cannot be used to make a lens ?

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  17. Where should an object be placed in front of a convex lens to get a re...

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  18. A spherical mirror and a thin spherical lens have each a focal length ...

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  19. No matter how far you stand from a mirror, your image appears erect. T...

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  20. The value of refractive index of diamond is

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