Home
Class 12
PHYSICS
Magnifying power of a simple microscope ...

Magnifying power of a simple microscope is (when final image is formed, at D=25cm from eye)

A

`D/f`

B

`1+D/f`

C

`1+f/D`

D

`1-D/f`

Text Solution

Verified by Experts

The correct Answer is:
B
(b) Whenfinal image is formed at D=25 cm from eye.
In this situation,v=-D frpm lens formula, `1/v-1/u=1/(f')`
we have, `1/(-D)-1/(-u)=1/f`
i.e., `D/u=1+D/f`
So magnifying power=`D/u=(1+D/f)`
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    DC PANDEY|Exercise Checkpoint 9.7|10 Videos

  • RAY OPTICS

    DC PANDEY|Exercise Exercise|171 Videos

  • RAY OPTICS

    DC PANDEY|Exercise Checkpoint 9.5|10 Videos

  • NUCLEI

    DC PANDEY|Exercise C MADICAL ENTRANCES GALLERY|46 Videos

  • REFLECTION OF LIGHT

    DC PANDEY|Exercise Subjective|9 Videos

Similar Questions

Explore conceptually related problems

The magnifying power of simple microscope is

A simple microscope is a combination of two lenses in contact of powers +15 D and +5D. Calculate the magnifying power of the microscope, if the final image is formed at 25 cm from the eye.

A simple microscope is a combination of two lenses of power + 15 D and + 5 D in contact. Calculate magnifying power of microscope, if final image is formed at 25 cm from the eye.

A simple microscope is a combination of two leses of powers + 15 D and + 5 D in contact. Calculate magnifying power of microscope, if final image is formed at 25 cm from the eye.

The magnifiying power of simple microscope is maximum when image is formed at _____

The magnifying power of simple microscope is 6 when the image is formed at distance of distinct vision (25 cm) from its optical centre. The focal power of the simple microscope in dipotre is

DC PANDEY-RAY OPTICS-Checkpoint 9.6
  1. For a normal eye, the least distance of distinct vision is

    Text Solution

    |

  2. When we see an object, image formed on the retina is (i) real (ii) v...

    Text Solution

    |

  3. The focal length of a normal eye lens is about

    Text Solution

    |

  4. An object is placed at a distance u from a simple microscope of focal ...

    Text Solution

    |

  5. Magnifying power of a simple microscope is (when final image is formed...

    Text Solution

    |

  6. In a compound microscope, the intermediate image is

    Text Solution

    |

  7. A compound microscope has two lenses. The magnifying power of one is 5...

    Text Solution

    |

  8. The length of the compound microscope is 14 cm. The magnifying power f...

    Text Solution

    |

  9. If the focal length of objective and eye lens are 1.2 cm and 3 cm resp...

    Text Solution

    |

  10. The focal length of objective and eye lens of a microscope are 4 cm an...

    Text Solution

    |

  11. If the telescope is reversed .i.e., seen seen from the objective side,...

    Text Solution

    |

  12. The aperture of a telescope is made large, because

    Text Solution

    |

  13. In an astronomical telescope, the focal length of the objective lens i...

    Text Solution

    |

  14. The focal lengths of the objective and eye lenses of a telescope are r...

    Text Solution

    |

  15. The number of lenses in a terrestrial telescope is

    Text Solution

    |

  16. Magnifying power of a Galilean telescope is given by

    Text Solution

    |

  17. In Gallilean telescope, the final image formed is

    Text Solution

    |

  18. Reflecting telescope consists of

    Text Solution

    |

  19. Resolving power of a microscope is given by

    Text Solution

    |

  20. The resolving power of a telescope whose lens has a diameter of 1.22 m...

    Text Solution

    |