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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 mirror in water will be

A

f

B

`4 f//3`

C

`3f //4`

D

none of the above

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MODERN PUBLICATION-UNIT TEST -06-EXERCISE
  1. A square wire of side 3 cm is placed 25 cm away from a concave mirror ...

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  2. If a concave mirror of focal length f produces a real image n times th...

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

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  4. A convex mirror of focal elongth f produces an image magnified m times...

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  5. A convex mirror forms an imge,which is 1//n times the size of the obje...

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  6. A short linear object of length b lies along the axis of a concave mir...

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  7. A diminihsed virtual image can be produced only with

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  8. A virtual image larger than the object can be produced by

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  9. The field of the view is maximum for

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  10. In case of spherical mirrors,which of the followed do/does not depend ...

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  11. Light appears to travel in a straight lines,since

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  12. If the light prpagating along a straight ine bends by a small but fixe...

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  13. A glass slab of thickness 4 cm contains the same number of waves as 5 ...

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  14. The lateral shift produced in a parallel sided glass slab depends on

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  15. Light passing from air to glass is refracted ,as is light passing from...

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  16. A person swimming at the bottom of a swimming pool lookds up to the di...

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  17. Total interval reflection takes place, when light travels from

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  18. A ray of light from a sodium lamp undergoes total internal reflection....

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  19. A ray of light falls on a right angled prism ABC (AB=BC) and travels a...

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  20. For the given incident ray as shown in the figrue,the condition of tot...

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