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What is meant by aperture, optical centr...

What is meant by aperture, optical centre and principal axis of a spherical lens?

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PRADEEP-REFLECTION AND REFRACTION-Short Q/A (3 marks)
  1. A convex lens of power 3 D is held in contact with a concave lens of p...

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  2. Calculate two possible distances of an object from a convex lens of fo...

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  3. An object 4 cm high is placed 40*0 cm in front of a concave mirror of ...

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  4. An object is placed at a distance of 12 cm in front of a concave mirro...

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  5. A 5.0 cm tall object is placed perpendicular to the principal axis of ...

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  6. An object is placed at a distance of 15 cm from a convex lens of focal...

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  7. Draw ray diagrams to show the formation of three times magnified (a) r...

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  8. An object 3.0 cm high is placed perpendicular to the principal axis of...

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  9. A concave lens has focal length of 20 cm. At what distance from the le...

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  10. An object 50 cm tall is placed on the principal axis of a convex lens....

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  11. A concave mirror is used as a head mirror by ENT specialists. The same...

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  12. Name the type of mirror used in the following situations : (a) Head ...

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  13. How will you distinguish between a plane mirror, a convex mirror and a...

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  14. Explain the concept of absolute refractive index and relative refracti...

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  15. What is meant by the 'angle of incidence' and the 'angle of refraction...

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  16. What is meant by aperture, optical centre and principal axis of a sphe...

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  17. What is power of a combination of lenses in contact ?

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  18. At what distance should an object be placed from a convex lens of foca...

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  19. At what distance should an object be placed from a convex lens of foca...

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  20. At what distance should an object be placed from a lens of focal leng...

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