Home
Class 12
PHYSICS
A microscope is focused on a mark on a p...

A microscope is focused on a mark on a piece of paper and then a slab of glass of thickness `3cm` and refractive index `1.5` is placed over the mark. How should the microscope be moved to get the mark in focus again ?

A

4 cm

B

2 cm

C

6 cm

D

8 cm

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    MOTION|Exercise Exercise-2|39 Videos

  • RAY OPTICS

    MOTION|Exercise Exercise-3|65 Videos

  • RAY OPTICS

    MOTION|Exercise Questions For Practice|29 Videos

  • RADIOACTIVITY & NUCLEAR PHYSICS

    MOTION|Exercise Exercise-3|81 Videos

  • ROTATIONAL MOTION

    MOTION|Exercise Exercise - 3 ( Section-B )|24 Videos

Similar Questions

Explore conceptually related problems

A travelling microscope can move vertically along a scale. It is focused at a mark O on the table and the reading on the vertical scale is r_(1) . Now a glass slab is placed over mark O and the microscope has to be moved up to bring the mark in focus again. This time the scale reads r_(2) . Lycopodium powder is spread over the top of the glass slab and the microscope is moved up once again to bring the powder particles in sharp focus. This time the vertical scale reads r_(3) . Find the refractive index of the material of the glass slab.

An ink mark on a sheet of paper is viewed through a glass slab of thickness t and refractive index mu . Through what distance the mark appears to be raised ?

The time taken by a ray of light to travel through a glass slab of thickness 2 cm and refractive index 1.5 will be

A travelling microscope is focussed on a mark made on a paper. When a slab of 1.45cm thickness is placed on the marl, the microscope has to be raised through 0.49 cm to focus the mark again. Calculate the refractive index of glass.

A small ink dot on a paper is seen through s glass slab of thickness 4 cm and refractive index 1.5 . The dot appears to be raised by

A small ink dot on a paper is viewed through a glass slab of thickness 10 cm , and refractive index 1.5 . By what distance would the dot appear to be raised ?

A small ink dot on a paper is viewed through a glass slab of thickness 10cm and refractive index 1.5. By what distance would the dot appear to be raised?

Calculate the shift produced by the slab having thickness 15cm and refractive index 1.5 which is kept in air.

A microscope is focussed on an ink mark on the top of a table. If we place a glass slab of 3 cm thick on it, how should the microscope be moved to focus the ink spot again? The refractive index of glass is 1.5

A point object is placed in front of a concave mirror. And its image is found to coincide with its own position. Now a glass slab of thickness 15 cm and refractive index 1.5 is placed in between object and the mirror. In order to form image again at the location of object, it is required to move the object

MOTION-RAY OPTICS-Exercise-1
  1. In the figure shown, there are two convex lenses L(1) and L(2) having ...

    Text Solution

    |

  2. What should be the value of distance d so that final image is formed o...

    Text Solution

    |

  3. If the central portion of a convex lens is wrapped in black paper as s...

    Text Solution

    |

  4. Focal length of a convex lens will be maximum for

    Text Solution

    |

  5. A convex lens form a real image of a point object placed on its princi...

    Text Solution

    |

  6. Shift on the principal axis

    Text Solution

    |

  7. When the length of a microscope tube increases, its magnifying power

    Text Solution

    |

  8. In a simple microscope, if the final image is located at infinity then...

    Text Solution

    |

  9. In a simple microscope, if the final image is located at infinity then...

    Text Solution

    |

  10. In astronomical telescope, the final image is formed at

    Text Solution

    |

  11. Two convex lenses of focal lengths 0.3m and 0.05m are used to make a t...

    Text Solution

    |

  12. An astronomical telescope has a magnifying power 10. The focal length ...

    Text Solution

    |

  13. The magnifying power of an astronomical telescope can be increased, if...

    Text Solution

    |

  14. If F(0) andF(e) are the focal lengths of the objective and eye-piece r...

    Text Solution

    |

  15. A microscope is focused on a mark on a piece of paper and then a slab ...

    Text Solution

    |

  16. An astronomical telescope of magnifying power 8 is made using two lens...

    Text Solution

    |

  17. The magnifying power of the objective of a compound microscope is 7 if...

    Text Solution

    |

  18. A telescope consisting of an objective of focal length 60 cm and a sin...

    Text Solution

    |

  19. An equiconvex lens has a power of 5 dioptre. If it is made of glass of...

    Text Solution

    |

  20. The length of a telescope is 36 cm . The focal lengths of its lenses c...

    Text Solution

    |