Home
Class 12
PHYSICS
In Finding experimentally, the mu of a l...

In Finding experimentally, the `mu` of a liquid using a convex lens and a plane mirror, parallax is removed when

A

object needle is at the slit focus of the lens

B

object needle is at `2 F`

C

object needle lies between `F` and `2 F`

D

none of the above

Text Solution

Verified by Experts

The correct Answer is:
A
Parallax is removed when object needle is at focus of the lens. On refraction through convex lens, rays are rendered parallel. They fall normally on the plane mirror, and retrace their path reflection. The image of the object is formed at only. That is why parallax is removed.
Promotional Banner

Topper's Solved these Questions

  • OPTICS

    PRADEEP|Exercise Problems for practice|4 Videos

  • OPTICS

    PRADEEP|Exercise Comprehension 1|1 Videos

  • OPTICS

    PRADEEP|Exercise Value based questions|3 Videos

  • MAGNETIC EFFECT OF CURRENT AND MAGNETISM

    PRADEEP|Exercise Competition Focus (Multiple Choice Questions)|2 Videos

Similar Questions

Explore conceptually related problems

State used of a convex lens.

The convex lens is used in-

Thin lens (Part-3)|Finding the refractive index of a liquid using concave mirror| lens mirror combination

The distance between a convex lens and a plane mirror is 10 cm. The parallel rays incident on the convex lens after reflection from the mirror forms image at the potical centre of the lens. Focal length of lens will be

The distance between a convex lens and a plane mirror is 15 cm. The parallel rays incident on the convex lens, after reflection from the mirror, form image at the optical centre of the lens. Draw the ray-diagram and find out the focal length of the lens.

When does a convex lens behave as a concave lens ?

When does a convex lens behave as a concave lens ?

Convex lens is used to correct :

PRADEEP-OPTICS-Exercise
  1. Statement-1 : The refractive index of a prism depends only on the kind...

    Text Solution

    |

  2. Statement-1 : A ray of light incident normally on a refracting surface...

    Text Solution

    |

  3. Statement-1 : Light travels faster in glass than in air. Statement-2...

    Text Solution

    |

  4. Statement-1 : Energy is created during constructive interference and i...

    Text Solution

    |

  5. Statement-1 : When a prism of mu = 3//2 is immersed in water (mu = 4//...

    Text Solution

    |

  6. Statement-1 : Focal length of an equiconvex lens of mu = 3//2 is equal...

    Text Solution

    |

  7. Statement-1 : Two prism joined in opposite alone can produce dispersio...

    Text Solution

    |

  8. Statement-1 : The dispersive power of a lens of focal length 10 cm is ...

    Text Solution

    |

  9. This question has a paragraph followed by two statements, Statement - ...

    Text Solution

    |

  10. Statement-1 : On viewing the clear blue portion of the sky through a C...

    Text Solution

    |

  11. An experment is performed to find the refractive index of glass using ...

    Text Solution

    |

  12. A student measures the focal length of a convex lens by putting an obj...

    Text Solution

    |

  13. In an experiment, electrons are made to pass through a narrow slit of ...

    Text Solution

    |

  14. We cannot find rough focal length of

    Text Solution

    |

  15. The lens formula is

    Text Solution

    |

  16. The shape of graph between 1//u and 1//v in case of a convex lens is F...

    Text Solution

    |

  17. If c is velocity of light in vacuum and v is the velocity of light in ...

    Text Solution

    |

  18. An equilateral prism produces a minimum deviation of 30^(@). The angle...

    Text Solution

    |

  19. In Finding experimentally, the mu of a liquid using a convex lens and ...

    Text Solution

    |

  20. A student has drawn the following courses of rays through a glass pris...

    Text Solution

    |