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An object is at a distance of 10 cm from...

An object is at a distance of 10 cm from a spherical mirror and the image of the object is at a distance of 30 cm from the mirror on the same side as the object.Is the mirror concave or convex?What is its focal length?

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MODERN PUBLICATION-REFLECTION OF LIGHT-EXERCISE
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  2. How far from a lamp must a concave mirror of focal length 3 m be place...

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  3. An object is at a distance of 10 cm from a spherical mirror and the im...

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  4. A 5 cm long needle lies along the principal axis axis of a concave mir...

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  5. An object is placed 15 cm from a convex mirror of radius of curvature ...

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  6. An object is at a distance of 5 m from a convex mirror of focal length...

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  7. An object is placed in front of convex mirror 20 cm radius of curvatur...

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  8. An object of 3 cm length is placed at 10 cm from the ple of a concave ...

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  9. An object placed 12 cm from the pole of a concave mirror produces a re...

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  10. An erect image of 3 tiems the size of the object is obtined with a con...

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  11. An object 8 cm long is placed at a distance of 100 cm from a concave m...

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  12. An object 2 cm high is placed at a distance of 5 cm from a concave mir...

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  13. An object is placed in front of a concave mirror of radius of curvatur...

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  14. A concave mirror produeces a real image of magnificaion 1//2,when an o...

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  15. Find the position of an object,which when placed in front of a concave...

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  16. An object is kept in front of a concave mirror of focal length 15 cm.T...

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  17. An object is kept in front of a concave mirror of focal length 15 cm.T...

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  18. An object 5.0 cm of length is placed at a distance of 20 cm in front o...

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  19. An object of 3 cm height is placed at a distance of 60 cm from a conve...

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  20. When an object is placed at a distance of 60 cm from a convex spherica...

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