Home
Class 12
PHYSICS
A magician during a show makes a glass l...

A magician during a show makes a glass lens with n = 1.47 disappear in a through of liquid. What is the refractive index of the liquid ? Could the liquid be water ?

Text Solution

Verified by Experts

The refractive index of the liquid must be equal to 1.47 in order to make the lens disappear. This means `n_(1) = n_(2)`. This gives `(1)/(f) = 0 or f rarr infty`. This lens in the liquid will act like a plane sheet of glass. No, the liquid is not water. It could be glycerine .
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    NEW JOYTHI PUBLICATION|Exercise SOLUTIONS TO EXERCISES FROM NCERT TEXT|53 Videos

  • RAY OPTICS AND OPTICAL INSTRUMENTS

    NEW JOYTHI PUBLICATION|Exercise PRACTICE PROBLEMS FOR SELF ASSESSMENT|20 Videos

  • NUCLEI

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|23 Videos

  • SEMICONDUCTOR ELECTRONICS : MATERIALS , DEVICES AND SIMPLE CIRCUITS

    NEW JOYTHI PUBLICATION|Exercise COMPETITIVE EXAM CORNER|37 Videos

Similar Questions

Explore conceptually related problems

When a glass lens with mu = 1.47 is immersed in a troug of liquid, it looks to be disappeared. The liquid in the trough could be

Study or refractive index of liquids and solutions using hollow prism

The refractive index of water is 1.33. What will be the speed of light in water?

A convex lens is dipped in a liquid, whose refractive index is equal to the refractive index of the lens. Then, its focal length will

The speed of the yellow light in a certain liquid is 2.4 x 10 8 ms^-1 . Find the refractive index of the liquid.

Refractive index of glass relative to water is 9/8. What is the refractive index of water relative to glass? (AS_(1))

A light ray is incident on air-liquid interface at 45^@ and is refracted at 30^@. What is the refractive index of the liquud? For what angle of incidence will the angle between reflected ray and refracted ray be 90^@? (AS_(7))

The absolute refractive index of water is 4/3. What is the critical angle? (AS_(1))

A prism is made of glass of unknown refractive index. A parallel beam of light is incident on a face of the prism. The angle of minimum deviation is measured to be 40^(@) .What is the refrective index of the material of the prism? The refracting angle of the prism is 60^(@) . If the prism is placed in water (refractive index 1.33) , predict the new angle of minimum deviation of a parallel beam of light .

NEW JOYTHI PUBLICATION-RAY OPTICS AND OPTICAL INSTRUMENTS -COMPETITIVE EXAM CORNER
  1. A magician during a show makes a glass lens with n = 1.47 disappear in...

    Text Solution

    |

  2. A 100 W bulb produces an electric field of 2.9 V/m at a point 3m away....

    Text Solution

    |

  3. The focal length of the objective and of the eye- piece of compound mi...

    Text Solution

    |

  4. The velocity of a moving galaxy is 300 kms^(-1) and the apparent chang...

    Text Solution

    |

  5. An astronomical telescope has an angular magnification of magnitude 5 ...

    Text Solution

    |

  6. If the reflected image formed is magnified and virtual, then the mirro...

    Text Solution

    |

  7. A vessel of depht 'x' is half filled with oil of refractive index mu(1...

    Text Solution

    |

  8. For an angle of incidence theta on an equilateral prism of refractive ...

    Text Solution

    |

  9. The power of a biconvex lens is 10 dioptre and the radius of corvature...

    Text Solution

    |

  10. The focal length of the lens of refractive index (mu = 1.5) in air is ...

    Text Solution

    |

  11. A glass prism of refractive index 1.5 is immersed in water (mu = (4)/(...

    Text Solution

    |

  12. A ray of light is incident at 60^(@) on one face of a prism of angle 3...

    Text Solution

    |

  13. An object is kept at a distance of 60 cm from a concave mirror. For ge...

    Text Solution

    |

  14. If the speed of light in material A is 1.25 times its speed in materia...

    Text Solution

    |

  15. The resolving power of a microscope is

    Text Solution

    |

  16. The least distance of distance vision of a person is 75 cm. The focal ...

    Text Solution

    |

  17. The focal lengths of the objective and the eyepiece of the telescope a...

    Text Solution

    |

  18. The angle of incidence for an equilateral prism of refractive index sq...

    Text Solution

    |

  19. The sunlight reaches us as white light and not as its compounts becaus...

    Text Solution

    |

  20. The apparent flattening of the sun at sunset and sunrise is due to

    Text Solution

    |

  21. Identify the mismatch in the following

    Text Solution

    |