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The size of the image formed as the di...

The size of the image formed ________ as the distance between the object and the lens decreases in convex lens.

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increases
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An object 1.5 cm is size is placed on the side of the convex lens in the arrangement (a) above. The distance between the object and the convex lens is 40 cm. Detemine the maguificatin produced by the two-lens system an the size of the image.

When an object is placed between F and C, the size of the image is _______ than that of the object for a convex lens.

If the distance D between an object and screen than 4 times the focal length of a convex lens, then there are two positions of the lens for which image are formed on the screen. This method is called conjugate method. If d is the distance between the two positions of the lens, obtain the equation for focal length of the convex lens.

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SURA PUBLICATION-OPTICS-ADDITIONAL QUESTIONS & ANSWER (Fill in the blanks (Covers whole unit))
  1. lenses are used is placed at infinity a is formed at the focus .

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  2. When an object is placed at infinity a is formed at the focus in conc...

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  3. The size of the image formed as the distance between the object and ...

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  4. lenses are used as wide angle spy hole in doors.

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  5. The ability of a lens to converge and diverge is called as its .

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  6. lenses are used in camera lenses.

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  7. The distance and perpendicular to the principal axis is taken as posi...

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  8. is defined as the ratio of the heigth of the image to the heigth of a ...

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  9. Any optically will have a refractive index.

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  10. Convex lens mostly produces image.

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  11. Power of a lens is numerically defined as the reciprocal of its .

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  12. and the lens maker's formula are applicable to only thin lenses.

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  13. protects the internal parts of the eye.

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  14. is the coloured portion of the eye.

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  15. A thin and transparent layer on the surface of eyeball is .

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  16. Central part of eye and pathway for the light to retina is .

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  17. Eye lens is fixed between the muscles.

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  18. Eye lens is in nature.

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  19. The ability of the eye lens to focus nearby as wll as the distant obje...

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  20. is the centre part of the iris.

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