Home
Class 12
PHYSICS
An observer can see through a pin-hole t...

An observer can see through a pin-hole the top end of a thin rod of height h, placed as shown in the figure. The beaker height is 3h and its radius h. When the beaker is filled with a liquid up to a height 2h, he can see the lower end of the rod. Then the refractive index of the liquid is

A

`(5)/(2)`

B

`sqrt((5)/(2))`

C

`sqrt((3)/(2))`

D

`(3)/(2)`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • NTA JEE MOCK TEST 51

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

  • NTA JEE MOCK TEST 53

    NTA MOCK TESTS|Exercise PHYSICS|25 Videos

Similar Questions

Explore conceptually related problems

An observer can see through a pin-hole the top end of a thin rod of height h, placed as shown in the figure. The height of beaker is 3h and its radius is h. When the beaker is filled with a liquid up to a height 2h , he can see the lower end of the rod. Then the refractive index of the liquid is

An observer can see through a small hole on the side of a jar (radius 15 cm) at a point at height of 15 cm from the bottom (see figure). The hole is at a height of 45 cm. When the jar is filled with a liquid up to a height of 30 cm the same observer can see the edge at the bottom of the jar. If the refractive index of the liquid is N//100 , where N is an integer, the value of N is ___________.

A beaker is filled with a liquid of density rho upto a height h If the beaker is at rest, the mean pressure at the walls is:

An observers line of sight is at P, when container of diameter 30 cmand height 45 cm is empty.If this container is filled with liquid upto 30 cm height he is able to see the edge of container.Find refractive index of liquid.

A cylindrical tank of height H is open at the top end and it has a radius r . Water is filled in it up to a height of h . The time taken to empty the tank through a hole of radius r' in its bottom is

A point source S is placed at the bottom of a tranparent block of height 10mm and refractive index 2.72. It is immersed in a lower refractive index liquid as shown in the figure. It is found that the light emerging from the block to the liquid forms a circular bright spot of diameter 11.54 mm on the top of the block. The refractive index of the liquid is

A glass beaker has diameter 4cm wide at the bottom. An observer observes the edge of bottom when beaker is empty as shown in figure. When the beaker is completely filled with liquid of refractive index n=sqrt(5//2) , he can just see the centre of bottom, then the height of glass beaker is :

NTA MOCK TESTS-NTA JEE MOCK TEST 52-PHYSICS
  1. Two long coaxial cylindrical metal tubes (inner radius a, outer radius...

    Text Solution

    |

  2. Using the conservation laws, demonstrate that the total mechanical ene...

    Text Solution

    |

  3. The figure shows a system of two concentric spheres of radii r1 and r2...

    Text Solution

    |

  4. As shown in figure the tension in the horizontal cord is 30 N. The wei...

    Text Solution

    |

  5. Find the decay constant of .^(55)Co radio nuclide if its activity is k...

    Text Solution

    |

  6. The equation of a simple harmonic progressive wave is given by y = A s...

    Text Solution

    |

  7. The potential energy of a particle varies as . U(x) = E0 for 0 le x...

    Text Solution

    |

  8. A sphere of radius 0.1m and mass 8 pi kg is attached to the lower en...

    Text Solution

    |

  9. An observer can see through a pin-hole the top end of a thin rod of he...

    Text Solution

    |

  10. A cubical block of side a is moving with velocity v on a horizontal sm...

    Text Solution

    |

  11. A particular semiconductor in equilibrium has 1xx10^(16)cm^(-3) donor ...

    Text Solution

    |

  12. One mole of monatomic ideal gas undergoes the process ArarrB , as in t...

    Text Solution

    |

  13. If x, v and a denote the displacement, the velocity and the accelerati...

    Text Solution

    |

  14. An open pipe is in resonance in 2nd harmonic with frequency f(1). Now ...

    Text Solution

    |

  15. A 0.5kg block slides from the point A on a horizontal track with an in...

    Text Solution

    |

  16. In the circuit shown in the figure (A), R(3) is a variable resistance ...

    Text Solution

    |

  17. A gas mixture consists of 2 moles of oxygen and 4 moles of argon at ...

    Text Solution

    |

  18. A long straight wire carrying current of 30 A is placed in an exte...

    Text Solution

    |

  19. A ball is projected form the ground at an angle of 45^(@) with the hor...

    Text Solution

    |

  20. In a double slit experiment ,the separation between the slits is d=0.2...

    Text Solution

    |