Home
Class 12
PHYSICS
In a compound microscope, the focal leng...

In a compound microscope, the focal lengths of two lenses are `1.5 cm` and `6.25 cm` an object is placed at `2 cm` form objective and the final image is formed at `25 cm` from eye lens. The distance between the two lenses is

A

`6.00 cm`

B

`7.75cm`

C

`9.25 cm`

D

`11.00 cm`

Text Solution

Verified by Experts

The correct Answer is:
D

`L=u_(o)+u_(e)=(u_(o)f_(o))/((u_(o)-f_(o)))+(f_(e)D)/(f_(e)+D)`
`impliesL=(2xx1.5)/((2-1.5))+(6.25xx25)/((6.25+25))=11cm`
Promotional Banner

Topper's Solved these Questions

  • GEOMETRICAL OPTICS

    A2Z|Exercise Problems Based On Mixed Concepts|37 Videos
  • GEOMETRICAL OPTICS

    A2Z|Exercise Section B - Assertion Reasoning|19 Videos
  • GEOMETRICAL OPTICS

    A2Z|Exercise Prism Theory And Dispersion Of Light|45 Videos
  • ELECTROMAGNETIC WAVES AND COMMUNICATION SYSTEM

    A2Z|Exercise Section D - Chapter End Test|30 Videos
  • MAGNETISM AND MATTER

    A2Z|Exercise Section D - Chapter End Test|30 Videos

Similar Questions

Explore conceptually related problems

In a compound microscope, the focal length of the objective and the eye lens are 2.5 cm and 5 cm respectively. An object is placed at 3.75cm before the objective and image is formed at the least distance of distinct vision, then the distance between two lenses will be ( i.e. length of the microscope tube )

The two lenses of a compound microscope are of focal lengths 2 cm and 5 cm. If an object is placed at a distance of 2.1 cm from (he objective of focal length 2 cm the final image forms at the least distance of distinct vision of a normal eye. Find the distance between the objective and eyepiece

The focal lengths of the objective and the eyepiece of a compound microscope are 1 cm and 5 cm respectively. An object is placed at a distance of 1.1 cm from the objective. For getting the final image at infinity, the distance between the two lenses, should be

The two lenses of a compound microscope are of focal lengths 2 cm and 5 cm. If an object is placed at a distance of 2.1 cm from the objetive of focal length 2 cm the final image forms at the least distance of distinct vision of a normal eye. Find the frnagnifying powerjof the microscope

If the focal length of objective and eye lens are 1.2 cm and 3 cm respectively and the object is put 1.25cm away from the objective lens and the final image is formed at infinity. The magnifying power of the microscope is

The focal lengths of the objective and eye-piece of a compound microscope are 1 cm and 5 cm, respectively. An object is placed 11 mm from the objective and the final image is 25 cm from the eye. Find : (a) magnification produced and (b) the separation of the lenses.

The focal lengths of the objective and the eyepiece of a compound microscope are 1.0 cm and 5.0 cm respectively. An object, placed at a distance of 1.1 cm from the objective, has its final image formed at a distance of 25 cm from the eye. Find the magnifying power of the microscope.

A2Z-GEOMETRICAL OPTICS-Optical Instruments
  1. The focal length of the objective and the eye piece of a compound micr...

    Text Solution

    |

  2. The objective lens of a compound microscope produces magnification of ...

    Text Solution

    |

  3. In a compound microscope, the focal lengths of two lenses are 1.5 cm a...

    Text Solution

    |

  4. A simple telescope, consisting of an objective of focal length 60 cm a...

    Text Solution

    |

  5. The diameter of the objective of the telescope is 0.1 metre and wavel...

    Text Solution

    |

  6. The focal length of objective and eye lens of a astronomical telescope...

    Text Solution

    |

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

    Text Solution

    |

  8. In Galilean telescope, if the powers of an objective and eye lens are ...

    Text Solution

    |

  9. The magnifying power of an astronomical telescope is 8 and the distanc...

    Text Solution

    |

  10. An opera glass (Galilean telescope ) measures 9cm from the objective t...

    Text Solution

    |

  11. When a telescope is adjusted for parallel light, the distance of the o...

    Text Solution

    |

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

    Text Solution

    |

  13. The diameter of the objective lens of a telescope is 5.0m and wavelen...

    Text Solution

    |

  14. A Galilean telescope has objective and eye- piece of focal lengths 200...

    Text Solution

    |

  15. An astronomical telescope of ten-fold angular magnification has a leng...

    Text Solution

    |

  16. The focal lengths of the lenses of an astronomical telescope are 50cm ...

    Text Solution

    |

  17. Sun's diameter is 1.4 xx10^(9)m and its distance from the earth is 10^...

    Text Solution

    |

  18. In a terrestrial telescope, the focal length of objective is 90cm, of ...

    Text Solution

    |

  19. A telescope has an objective of focal length 50cm and an eyepiece of f...

    Text Solution

    |

  20. A telescope of diameter 2m uses light of wavelength 5000 Å for viewing...

    Text Solution

    |