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State used of a convex lens....

State used of a convex lens.

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Convex lenses are used in a simple microscope , compound microscope , refracting telescope , camera , projector , spectacles for correcting farsightedness(hypermetropia) and binoculars.
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State used of a concave lens.

Use the thin lens formula to show that an object placed within the focus of a convex lens produces a virtual and enlarged image.

Calculate the position of the image of an object when placed at (a) focus of a convex lens. (b) focus of a convex lens.

a) Explain with the help of a digaram, why the convex lens is also called a converging lens. b) Define principle axis, principle focus and focal length of a convex lens.

State two differences between a convex lens and a concave lens. Give one use of convex lens and one of concave lens.

State three characteristics of the image formed by a convex lens when the object is close to it.

State the rules to draw a ray diagram of a convex lens with proper figures.

NAVNEET PUBLICATION - MAHARASHTRA BOARD-LENSES-Answer the following questions :
  1. My grandfather uses a bifocal lens in his spectacles. Explain why.

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  2. State used of a concave lens.

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  3. State used of a convex lens.

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  4. What is meant by the apparent size of an object ? With a neat and labe...

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  5. With a neat labelled diagram, explain the working of a simle microscop...

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  6. What does a simple microscope consist of ? What is the order of magni...

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  7. With a neat labelled diagram, explain the construction and working of ...

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  8. State two uses of a compound microscope .

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  9. What will happen if in a compound microscope , the objective lens is l...

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  10. In which type of microscope do you find the lens arrangement as shown ...

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  11. Write in brief , the working of this microscope.

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  12. Where is this microscope used ?

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  13. Which type of microscope has the arrangement of lenses shown in the fo...

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  14. Label the figure correctly .

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  15. Write the working of this microscope .

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  16. Where is this microscope used ?

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  17. Suggest a way to increase the efficiency of this microscope.

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  18. With a neat labelled diagram, explain the working of a refracting tele...

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  19. Explain the working of an astronomical telescope using refraction of l...

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  20. State the used of a telescope.

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