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An astronomical telescope,when in normal...

An astronomical telescope,when in normal adjustment has magnifying power 5.If the distance between two lenses is 24 cm,find the focal length of both the lenses.

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MODERN PUBLICATION-Optical Instruments-EXERCISE
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  5. Sherllock Homes looks at a fingerprint with a magnifying glass of powe...

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  6. A converging lens of power 25 D is used as a simple microscoe.Calculae...

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  7. A man with normal near point (25 cm) reads a book with small print usi...

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  8. A man with normal near point (25 cm) reads a book with small print usi...

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  9. In a compound microscope,an object is placed at a distance of 1.5 cm f...

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  10. The focal lengths of the objective and eye-piece of a compound microsc...

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  11. A compound microscope consists of an objective lens of focal length 2....

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  12. The total magnification produced by a compound microscope is 20,while ...

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  13. An astronoical telescope consists of two thin lenses set 36 cm apart a...

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  14. The magnifying power an astronomical telescope in the normal adjustmen...

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  15. An astronomical telescope,when in normal adjustment has magnifying pow...

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  16. A small telescope has an objective lens of focal length 140cm and an e...

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  17. An astronomical telescope,when in normal adjustment has magnifying pow...

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  18. A reflecting type telescope has a large spherical mirror for its objec...

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  19. The objective of telescope A has a diameter 3 times that of the object...

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  20. The lens of our eye has a diameter of 0.8 cm .How much fainter star ca...

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