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Answer the following questions : Observ...

Answer the following questions :
Observe the following figure and answer the questions : How can we get different magnifications in this optical instrument ?

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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 : Observe the following figure and ans...

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

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

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

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

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

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

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

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

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

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

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  13. What is colour blindness?

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

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

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

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  17. Give scientific reasons : A concave lens is known as a diverging len...

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  18. Give scientific reasons: Simple microscope is used for watch repair

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  19. Give scientific reasons : Watch repairers use a magnifying glass.

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  20. Give scientific reasons : In old age, a bifocal lens is necessary fo...

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