Home
Class 12
PHYSICS
A point source of light S is placed at t...

A point source of light `S` is placed at the bottom of a vessel containing a liquid of refractive index `5//3`. A person is viewing the source from above the surface. There is an opaque disc of radius `1 cm` floating on the surface. The centre of disc lies vertically above the source `O`. The liquid from the vessel is gradually drained out through a tap. What is the maximum height of the liquid for which the source cannot be seen at all.

Text Solution

Verified by Experts

The correct Answer is:
1.33 cm
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    PHYSICS GALAXY - ASHISH ARORA|Exercise Advance MCQs with One or More Options Correct|30 Videos

  • ELECTROSTATICS

    PHYSICS GALAXY - ASHISH ARORA|Exercise Unsolved Numberical Problems|73 Videos

  • HEAT AND THERMAL EXPANSION

    PHYSICS GALAXY - ASHISH ARORA|Exercise UNSOLVED NUMRICAL PROBLEMS FOR PREPARATION OF NSEP, INPhO & IPhO|82 Videos

Similar Questions

Explore conceptually related problems

A point source of light is placed at a depth of h below the surface of water of refractive index mu . A floating opaque disc is placed on the surface of water so that light from the source is not visible from the surface. The minimum diameter of the disc is

A point source of light is placed at the bottom of a vessel which is filled with water of refractive index mu to a height h. If a floating opaque disc has to be placed exactly above it so that the source is invisible from above, the radius of the disc should be-

A small illuminated bulb is at the bottom of a tank, containing a liquid of refractive index mu upto a height H. Find the expression for the diameter of an opaque disc, floating symmetrically on the liquid surface in order to cut- off the light from the bulb.

A point source of light is placed 4m below the surface of a liquid of refractive index 5//3 . The minimum diameter of a disc, which should be placed over the source, on the surface of the liquid to cut off all light out of water, is

A point object is placed at the centre of a glass sphere of radius 6cm and refractive index 1.5. The distance of virtual image from the surface is

A point source of light is placed 4 m below the surface of water of refractive index 5//3 . The minimum diameter of a disc, which should be placed over the source, on the surface of water to cut-off all light coming out of water is

A point source of light is placed at a depth h=0.5 m below the surface of a liquid (mu=5/4) , Then , the fraction of light energy that escape directly from the liquid surface is

PHYSICS GALAXY - ASHISH ARORA-GEOMETRICAL OPTICS-Unsolved Numerical Problems
  1. A prism has refractive index sqrt((3)/(2)) and refractive angle 90^@. ...

    Text Solution

    |

  2. Image of an object approaching a convex mirror of radius of curvature ...

    Text Solution

    |

  3. A ray is incident on a glass sphere as shown.The opposite surface of t...

    Text Solution

    |

  4. Light is incident normally on the short face of a 30^@-60^@-90^@ prism...

    Text Solution

    |

  5. A convex lens of crown glass is perfectly cemented to a plano-concave ...

    Text Solution

    |

  6. A converging system of convex lenses free from chromatic aberration an...

    Text Solution

    |

  7. For a ray of light refracted through a prism of angle 60^(@), the angl...

    Text Solution

    |

  8. ln a biprism experiment, 21 fringes are seen distinctly on a screen at...

    Text Solution

    |

  9. In a direct vision spectroscope there are two flint glass prisms each ...

    Text Solution

    |

  10. An achromatic doublet of focal length 50 cm is used as an objective of...

    Text Solution

    |

  11. A ray of light incident normally on one of the faces of a right-angle ...

    Text Solution

    |

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

    Text Solution

    |

  13. The focal lengths of the objective and eye-piece of a compound microsc...

    Text Solution

    |

  14. Two lenses in contact made of materials with dispersive powers in the ...

    Text Solution

    |

  15. A compound microscope has an objective of focal length 2 cm and eye-pi...

    Text Solution

    |

  16. A convex lens of focal length 15 cm is placed in front of a convex mir...

    Text Solution

    |

  17. An object of height 4 cm is kept to the left of and on the axis of a c...

    Text Solution

    |

  18. The refractive index of the material of a prism of refracting angle 45...

    Text Solution

    |

  19. A point source of light S is placed at the bottom of a vessel containi...

    Text Solution

    |

  20. A ray of light is incident on a prism ABC of mu = sqrt(3) as shown in ...

    Text Solution

    |