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An object is kept at a distance of 0.3 m...

An object is kept at a distance of 0.3 m from a concave mirror. If magnification is `(1)/(2)` , then determine the focal length of the concave mirror.

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The correct Answer is:
0.1 m
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CHHAYA PUBLICATION-REFLECTION OF LIGHT-PROBLEM SET - I
  1. An arrow of length 15 cm is placed along the axis of a concave mirror....

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  2. A beam of converging rays from a point source would meet behind spheri...

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  3. The focal length of a concave mirror is 20 cm . Where should an object...

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  4. What type of a spherical mirror is required to project the image of th...

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  5. At what distance from a concave mirror an object should be placed to g...

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  6. The diameter of the moon is about 2160 km . When the moon's distance f...

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  7. A planet subtends an angle (6)/(pi) min at the pole of a concave mirro...

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  8. An object is kept at a distance of 0.3 m from a concave mirror. If mag...

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  9. A man wants to observe his own eye with the help of a concave mirror o...

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  10. An object of size 5 cm is placed at a distance of 2 m from a concave ...

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  11. An object is placed at a distance x from the principal focus of a sphe...

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  12. The sun (diameter d) subtends an angle theta radian at the pole of a c...

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  13. A narrow rod of length (f)/(3) is placed along the axis of a concave ...

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  14. A square plate of side 4 cm is situated at a distance of 20 cm from a ...

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

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

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  17. The image formed by a convex mirror is one third of the object. If th...

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  18. A virtual image of half the size of the object is formed by a convex m...

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  19. What will be the magnification of an object placed at 2f from the pole...

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

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