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Give scientific reasons : When a burni...

Give scientific reasons :
When a burning stick of incense is moved fast in a circle , a circle of red light is seen.

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NAVNEET PUBLICATION-LENSES-EXERCISE
  1. Give scientific reasons : A convex lens converges the rays of light ...

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  2. Give scientific reasons : A concave lens diverges the rays of light ...

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  3. Give scientific reasons : When a burning stick of incense is moved f...

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  4. Give scientific reasons : Colour- blind persons are unable to distin...

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  5. Give scientific reasons : It is risky to issue a driving license to ...

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  6. Distinguish between the following : Real image and virtual image.

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  7. Distinguish between the following : Concave lens and convex lens .

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  8. Distinguish between the following : farsightedness (hypermetropia) a...

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  9. Distinguish between the following : Simple microscope and compound mi...

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  10. Distinguish between the following : compound microscope and astronomi...

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  11. Distinguish between the following : Simple microscope and Astronomica...

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  12. Read the following paragraph and answer the following questions given ...

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  13. Read the following paragraph and answer the following questions given ...

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  14. Read the following paragraph and answer the following questions given ...

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  15. Read the following paragraph and answer the following questions given ...

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  16. Read the following paragraph and answer the following questions given ...

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  17. Solve the following examples/ numerical problems: < br > An object is ...

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  18. Solve the following examples/ numerical problems: < br > The focal len...

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  19. Solve the following examples/ numerical problems: When a pin of heig...

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  20. Solve the following examples/ numerical problems: < br > At what dista...

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