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A convex lens is ……… in the miiddle than...

A convex lens is ……… in the miiddle than at edges

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A. a convex lens a. is thicker at the edges than at the middle. b. is thicker at the middle than at the edges. c. Diverges rays of light. d. is of uniform thickness everywhere. B. with the help of a ray diagram sketch the image formation of a convex lens when the object is between C and F. C. Derive the lens maker's formula.

________ lens is thinner at the centre than at the edges.

__________ lens is thicker at the centre than at the edges.

A concave lens is kept in contact with a convex lens of focal length 20 cm. The combination behaves as a convex lens of focal length 50 cm . Find the power of concave lens.

A convex lens is made of a material having refractive index 1.2. Both the surface of the lens are convex. If it is dipped into water (mu=1.33) it will behave like

FULL MARKS-OPTICS-ADDITIONAL QUESTIONS (II. Fill in the blanks)
  1. The interacting particles of the medium is called as .

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  2. When white light pass through transparent medium, it is split into col...

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  3. The speed of light in a medium is high if the refractive index of the...

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  4. The spectral lines which are having frequences other than the incident...

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  5. ……… lenses are used to correct the defect of vision called hypermetero...

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  6. lenses are used as eye lens of 'Galilean Telescope'

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  7. By convention , the power of a convex lens is taken as ………… whereas th...

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  8. The diameter of eye ball in our eye is .

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  9. ……………. Is achieved by changing the focal length of the lens with the h...

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  10. is the coloured portion of the eye.

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  11. …………… is used to observe parts of flower , insects and finger prints i...

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  12. A microscope works based on the principle of vernier.

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  13. An …………. Telescope is used to view heavenly bodies like strars , plane...

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  14. is an optical instrument used to see distant objects.

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  15. ……….. Is the most sensitive part of human eye.

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  16. A convex lens is ……… in the miiddle than at edges

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  17. ……. Lens produces mostly real images.

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  18. Unit of power is .

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  19. The amount of scattering of light is inversely proportional to the po...

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  20. The refractive index of a medium is dependent on the .

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