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A concave mirror of focal length f (in ...

A concave mirror of focal length f (in air) is immersed in water `(mu = (4)/(3))` . The focal length of the concave mirror in water will be

A

f

B

`(4)/(3)f`

C

`(3)/(4)f`

D

`(7)/(3)f`

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The correct Answer is:
A
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CHHAYA PUBLICATION-REFLECTION OF LIGHT-EXERICISE (MCQ)
  1. A concave mirror has radius of curvature r and focal length f. An obje...

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  2. A concave mirror has radius of curvature r and focal length f. An obje...

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  3. A concave mirror has radius of curvature r and focal length f. An obje...

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  4. A mirror forms a real image of unit magnification. Nature of the mirro...

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  5. If an object is placed at a distance of 40 cm from a concave mirror of...

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  6. A person standing in fornt of a mirror finds his image larger than him...

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  7. A convex mirror has focal length f. An object is placed at a distance ...

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  8. An object is placed at a distance of 20 cm from a concave mirror of fo...

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  9. An radius of curvature of a convex mirror is 40 cm and the size of th...

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  10. A concave mirror of focal length f (in air) is immersed in water (mu ...

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  11. A concave mirror of focal length 15 cm forms an image twice the size o...

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  12. The image of a point object placed at 10 cm from a concave mirror, is...

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  13. A small linear object of length b is situated along the axis of a conc...

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  14. If the object distance and image distance from the focus of a spherica...

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

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  16. If a graph is drawn taking x and y as the object distance and the imag...

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  17. A rod is standing in front of a mirror on its axis. The virtual image ...

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  18. Image that indicate positive magnification is

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  19. An object is approaching a convex mirror. The ratio of the velocity of...

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  20. A car is fitted with a convex side-view mirror of focal length 20 cm. ...

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