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A fish is rising up veritcally inside a ...

A fish is rising up veritcally inside a pond with velocity `4 m//s,` and notices a bird, which is dividing downward and its velocity appear to be `16 m//s` (to fish). What is the real velocity of the diving bird, if refractive index of water is `4//3?`

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The correct Answer is:
`9 cm//s`
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RESONANCE ENGLISH-GEOMATRICAL OPTICS -Exercise-1
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  3. A fish is rising up veritcally inside a pond with velocity 4 m//s, and...

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  4. Find the apparednt distance between the observer and the object shwon ...

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  5. Find the apparent depth of object of the object seen by observe A (in...

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  6. Locate the image fo the point P as seen by the eye in the figure.

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  7. A small object is placed at the centre of the bottom of a cylindrical ...

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  8. A point source is placed at a depth h below the surface of water (re...

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  9. Light falls from glass (mu=1.5) to air. Find the angle of incidence fo...

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  10. At what values fo the refractive index of a recantangular prism can...

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  11. A prism (n = 2) of apex angle 90^(@) is palced in air (n = 1). What ...

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  12. The refracting angle of a glass prism is 30^@. A ray is incident onto ...

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  13. Find the angle of devaition suffered by the light ray shown in figu...

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  14. The refractive index of a prism is mu. Find the maximum angle of the ...

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  15. An extended object of size 2cm is placed at a distance of 10cm in air...

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  16. A point object lies inside a transpatent solid sphere of radius 20cm ...

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  17. An object is placed 10cm away form a glass piece (n = 1.5) of length ...

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  18. There is small air bubble inside a glass sphere (mu = 1.5) of radius ...

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  19. A smell object Q of length Q of length 1mm leis along the principle ...

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  20. A narrow pencil of parallel light is incident normally on a solid tran...

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