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Answer the following questions :
Explain the working of an astronomical telescope using refraction of light .

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NAVNEET PUBLICATION-LENSES-EXERCISE
  1. Answer the following questions : Observe the following figure and ans...

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  2. Answer the following questions : With a neat labelled diagram , expla...

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  3. Answer the following questions : Explain the working of an astronomic...

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  4. Answer the following questions : State the use of a telescope .

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  5. Answer the following questions : Observe the following figure and ans...

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  6. Answer the following questions : Observe the following figure and ans...

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  7. Answer the following questions : Observe the following figure and ans...

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  8. Answer the following questions : What is the persistence of vision ? ...

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  9. Answer the following questions : Name two devices whose working is ba...

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  10. Answer the following questions : Name any two applications based on p...

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  11. Answer the following questions : How is the phenomenon of persistance...

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  12. Answer the following questions : Name the two types of light sensitiv...

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  13. Answer the following questions : When do you say that a person iscolo...

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  14. Answer the following questions : Explain the perception of colour in ...

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  15. Answer the following questions : Explain in short perception of colou...

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  16. Answer the following questions : Write a note on perception of colour...

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  17. What is colour blindness?

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  18. Answer the following questions : What are some persons colour- blind?...

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  19. Answer the following questions : What are the difficulties faced by a...

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  20. Give scientific reasons : A convex lens is known as a converging len...

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