Home
Class 12
PHYSICS
A fish looking up through the water sees...

A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is `(4)/(3)` and the fish is 12 cm below the surface, the radius of this circle is cm is

A

`36ssqrt5`

B

`5sqrt5`

C

`36sqrt7`

D

`36sqrt7`

Text Solution

Verified by Experts

The correct Answer is:
D
`sinC=(1)/(mu)=(1)/(4//3)=(3)/(4)`.
Now `h tan C=12xx(3)/(sqrt7)=(36)/(sqrt7)cm`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    DISHA PUBLICATION|Exercise Exercise - 1 : Concept Builder (Topicwise)(Topic 3 : Refraction of light at Spherical Surface and Power of Lens)|15 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    DISHA PUBLICATION|Exercise Exercise - 1 : Concept Builder (Topicwise)(Topic 4 : Prism and Dispersion of Light)|9 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    DISHA PUBLICATION|Exercise Exercise - 1 : Concept Builder (Topicwise)(Topic 1 : Plane Mirror, Spherical Mirror and Reflection of Light)|19 Videos

  • PHYSICAL WORLD, UNITS AND MEASUREMENTS

    DISHA PUBLICATION|Exercise Exercise - 2 : Concept Applicator|30 Videos

  • SEMICONDUCTOR ELECTRONICS : METERIALS, DEVICES AND SIMPLE CIRCUITS

    DISHA PUBLICATION|Exercise EXERCISE -2: CONCEPT APPLICATOR|25 Videos

Similar Questions

Explore conceptually related problems

A fish looking up through the water sees the outside world contained in a circular horizon. If the refractive index of water is 4//3 and the fish is 12cm below the surface, the radius of this circle in cm is

A diver looking up through the water sees the outside world contained in a circular horizon. The refractive index of water is (4)/(3) , and the diver's eyes are 15 cm below the surface of 3 water. Then the radius of the circle is:

A fist looking from within water sees the outside world through a circular horizon. If the fish sqrt(7) cm below the surface of water, what will be the radius of the circular horizon

The force required to take away a flat circular plate of radius 4 cm from the surface of water is

In a pond of water, a flame is held 2 m above the surface of the water. A fish is at depth of 4 m from the water surface. Refractive index of water is (4)/(3) . The apparent height of the flame from the eyes of fish is -

A fish lies at the bottom of a 4 m deep water lake. A bird flies 6m above the water surface and refractive index of water is 4//3 . Then the distance between

DISHA PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS-Exercise - 1 : Concept Builder (Topicwise)(Topic 2 : Refraction of Light at Plane Surface and Total Internal Reflection)
  1. When light is refracted into a medium

    Text Solution

    |

  2. The ratio of thickness of plates of two transparent medium A and B is ...

    Text Solution

    |

  3. The refractive indices of glass and water with respect to air (1)/(2) ...

    Text Solution

    |

  4. The wavelength of a monochromatic light in vacuum is gamma. It travels...

    Text Solution

    |

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

    Text Solution

    |

  6. A ray of light travelling in water is incident on its surface open to ...

    Text Solution

    |

  7. A ray of light is lncident on a glass plate at 60^(@). The reflected a...

    Text Solution

    |

  8. Total internal reflection can take only if

    Text Solution

    |

  9. Electromagnetic radiation of frequency n, wavelength lambda, travellin...

    Text Solution

    |

  10. A ray of light travelling inside a rectangular glass block of refracti...

    Text Solution

    |

  11. A narrow beam of white light enters slab having parallel faces.

    Text Solution

    |

  12. A ray is incident at an angle 60^(@) on a sphere which is made of mate...

    Text Solution

    |

  13. A fish looking up through the water sees the outside world contained i...

    Text Solution

    |

  14. A ray of light passes from vaccum into a medium of refractive index n....

    Text Solution

    |

  15. A small coin is resting on the bottom of a beaker filled with liquid. ...

    Text Solution

    |

  16. Let the x-z plane be the boundary between two transparent media. Mediu...

    Text Solution

    |

  17. A transparent solid cylindrical rod has a refractive index of (2)/(sqr...

    Text Solution

    |