Home
Class 12
PHYSICS
A thin biconvex lens of refractive index...

A thin biconvex lens of refractive index `3//2` is placed on a horizontal plane mirror as shown in Figure . The space between the lens and the mirror is then fille with water or refractive index `4//3`. It is found that when a point object is placed 15 cm above the lens on its principal axis, the object coincides with its own image. On representing with another liquid, the object and the image again coincide at a distance 25 cm from the lens. Calculate the refractive index of the liquid.

A

1.4

B

1.5

C

1.6

D

1.7

Text Solution

Verified by Experts

The correct Answer is:
A
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise PRACTICE SHEET (ADVANCED) (MORE THAN ONE CORRECT TYPE QUESTIOS)|4 Videos

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise PRACTICE SHEET (ADVANCED) (LINKED COMPREHENSION CORRECT TYPE QUESTIOS)|7 Videos

  • GEOMETRICAL OPTICS

    AAKASH SERIES|Exercise ADDITIONAL PRACTICE EXERCISE -I (LEVEL-II LECTURE SHEET (ADVANCED) INTEGER TYPE QUESTIONS)|4 Videos

  • ELEMENTS OF VECTORS

    AAKASH SERIES|Exercise QUESTIONS FOR DESCRIPTIVE ANSWERS|10 Videos

  • LAWS OF MOTION

    AAKASH SERIES|Exercise PRACTICE EXERCISE|106 Videos

Similar Questions

Explore conceptually related problems

A thin equiconvex lens of refractive index 3//2 is placed on a horizontal plane mirror as shown in figure. The space between the lens and the mirror is filled with a liquid of refractive index 4//3 . It is found that when a point object is placed 15 cm above the lens on its priincipal axis, the object coincides with its own image. Q. If another liquid is filled instead of water, the object and the image coincide at a distance 25 cm from the lens. Calculate the refractive index of the liquid.

A thin equiconvex lens of refractive index 3//2 is placed on a horizontal plane mirror as shown in figure. The space between the lens and the mirror is filled with a liquid of refractive index 4//3 . It is found that when a point object is placed 15 cm above the lens on its priincipal axis, the object coincides with its own image. Q. The radius of curvature of the convex surface is

An equiconvex lens of refractive index n_(2) is placed such that the refractive index of the surrouding media is as shown. The lens :

A thin bi-convex lens made up of glass of refractive index 3//2 is placed is front of a plane mirror. The space between the lens and the mirror is filled with water of refractive index 4//3 . The radii of curvatures of the lens are R_(1)=15cm and R_(2)=25 cm . A point object is placed at distance x from the surface whose curvature is R_(1) . The distance x is greater than the separation between the lens and the mirror. Find the value of x so that image must coincide with the object.

A biconvex lens of focal length 15cm is in front of a plane mirror. The distance between the lens and the mirror is 10cm. A small object is kept at distance of 30cm from the lens. The final image is

On a horizontal plane mirror, a thin equiconvex lens of glass is placed and when the space between the lens and mirror is filled with a liquid, an object held at a distance D which is 30cm vertically above the lens is found to coincide with its own image as shown in Figure. If equiconvex lens of glass has refractive index mu=1.5 and radius of curvature R=20cm then find refractive index of the liquid.

A thin convex lens of focal length 30 cm is placed in front of a plane mirror. An object is placed at a distance x from the lens (not in between lens and mirror ) so that its final image coincides with itself. Then, the value of x is

An small object is kept at 18cm from combination of a convex lens and plane mirror to get the image on object itself. Now the space between lens and mirror is filled with liquid of refractive index muL . Now we need to keep the object at 27cm to get the image on object. Find muL .

A convex lens of focal length 15 cm is placed on a plane mirror. An object is placed at 30 cm from the lens. The image is

A thin lens of focal length +10.0 cm lies on a horizontal plane mirror. How far above the lens should an object be be held if its image is to coincide with the object?

AAKASH SERIES-GEOMETRICAL OPTICS-PRACTICE SHEET (ADVANCED) (STRAIGHT OBJECTIVE TYPE QUESTIOS)
  1. A ray of light travelling in glass having refractive index (a)mu(g)=3/...

    Text Solution

    |

  2. A light ray is normally incident onone face of equilateral glass prism...

    Text Solution

    |

  3. Light ray is incident on a prism of angle A=60^(@) are refractive inde...

    Text Solution

    |

  4. The n transparent slabs of refractive index1.5 each having thickness 1...

    Text Solution

    |

  5. A glass sphere of diameter 50 cm and mu=1.5 has a small air bubble. Lo...

    Text Solution

    |

  6. A parallel beam falls on solid glass sphere of radius R and refractive...

    Text Solution

    |

  7. A transparent glass sphere of radius 10 cm and refractive index mu=1.5...

    Text Solution

    |

  8. A convex lens of focal length 20cm and another plano convex lens of fo...

    Text Solution

    |

  9. Find the focal length of the lens shown in Fig.

    Text Solution

    |

  10. Light is incident on the thin lens as shown in figure. The refractive ...

    Text Solution

    |

  11. When an object is placed 40cm from a diverging lens, its virtual image...

    Text Solution

    |

  12. The given lens is broken into four parts rearranged as shown. If the i...

    Text Solution

    |

  13. A thin converging lens is placed between as fixed object and a screen....

    Text Solution

    |

  14. A thin biconvex lens of refractive index 3//2 is placed on a horizonta...

    Text Solution

    |

  15. A convex lens is placed between an object and a screen which are at a ...

    Text Solution

    |

  16. The value of escape speed from the surface of earth is

    Text Solution

    |

  17. Two lenses shown in figure. Are illuminated by a beam of parallel ligh...

    Text Solution

    |

  18. A double convex lens forms a real image of an objectt on a screen whic...

    Text Solution

    |

  19. Choose the correct ray diagram of an equi convex lens which is cut as ...

    Text Solution

    |

  20. A biconvex thin lens of radius of curvature R is made up of variable r...

    Text Solution

    |