Home
Class 11
PHYSICS
In a simple microscope, if the final ima...

In a simple microscope, if the final image is located at infinity then its magnifying power is

A

`(f)/(D)`

B

`(D)/(f)`

C

`(L)/(f_(o)), (D)/(f_(o))`

D

`(D+(1)/(f))`

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Topper's Solved these Questions

  • RAY OPTICS

    TARGET PUBLICATION|Exercise CRITICALTHINKING|38 Videos
  • RAY OPTICS

    TARGET PUBLICATION|Exercise COMPETITIVE THINKING|68 Videos
  • OPTICS

    TARGET PUBLICATION|Exercise EXERCISE|447 Videos
  • REFRACTION OF LIGHT

    TARGET PUBLICATION|Exercise EVALUATION TEST|15 Videos

Similar Questions

Explore conceptually related problems

In a compound microscope, the intermediate image is

For simple microscope to work,

Magnification of simple microscope when image is at infinity is given by

A convex lens of focal length 12.5 cm is used as a simple microscope. When the image is formed at infinite, magnification is _______ (Near point for the normal vision is 25 cm).

In simple microscope, ______lens is used

When the final image is formed at infinity the magnifying power of compound microscope is (using new Cartesian sign conventions)

Simple microscope is used for watch repairs.

Read the following paragraph and answer the following questions given below it : Construction of a compound microscope : (i) Acompound microscope consists of a metal tube fitted with two convex lenses at the two ends. These lenses are called the objective lens ( the lens directed towards the object ) and the eyepiece ( the lens directed towards the eye ). Both the lenses are small in size , but the cross section of the objective lens has a short focal length . the focal length of the eyepiece is more than that of the objective lens . (ii) The metal tube is mounted on a stand . thr principal axes of the objective lens and the eyepiece are along the same line . The distance between the object and objective lens can be changed with a screw . It is possible to change the distance between the objective lens and the eyepiece. Working : (i) The object to be observed is illuminated and placed in front of the objective lens. slightly beyond the focal length of the objective lens. it's real , inverted and enlarged image is formed by the objective lens on the other side. (ii) This intermediate image lies with in the focal length of the eyepiece. It serves as an object for the eyepiece. The eyepiece works as a simple microscope . the final image is virtual, highly enlarged and inverted with respect to the original object . It can be formed at the minimum distance of distinct vision from the eyepiece . The final image is observed by keeping the eye close to the eyepiece. Use: This microscope is used to observe blood cells , microorganisms , etc. State which distance is adjusted to observe the object with a compound microscope ?

The magnifying power of simple microscope, when image is formed at DDV, is (where f is its focal lengths of)

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

TARGET PUBLICATION-RAY OPTICS-EVALUATION TEST
  1. In a simple microscope, if the final image is located at infinity then...

    Text Solution

    |

  2. When image is fomred by reflaction, the field of veiw is maximum for

    Text Solution

    |

  3. A candle flame 2 cm high is placed at distance of 2 meter from a wall....

    Text Solution

    |

  4. An infinitely long rod lies along the axis of a concave mirror of foca...

    Text Solution

    |

  5. Assertion : If objective and eye lens of a mcroscope are interchanged ...

    Text Solution

    |

  6. The convex surface of a thin concavo-convex lens of glass of refractiv...

    Text Solution

    |

  7. Focal length of a convex/ concave mirror depends on

    Text Solution

    |

  8. A convex lens focal lenghts 30 cm made of glass of refractive index 1....

    Text Solution

    |

  9. Magnifying power of a telescope in normal adjustment when final images...

    Text Solution

    |

  10. Two plano-concave lenses (1 and 2) of glass of refractive index 1.5 ha...

    Text Solution

    |

  11. Assertion : If radius of curvature of mirror is doubled, focal length ...

    Text Solution

    |

  12. An experiment needs to heat a small sample to 700 K, but the only avai...

    Text Solution

    |

  13. Assertion : A dentist uses a convex mirror to examine a small cavity i...

    Text Solution

    |

  14. A man with normal near- point (25c m) reads a book with small print us...

    Text Solution

    |

  15. For a given compound microscope, increase in length of tube

    Text Solution

    |

  16. Which of the following (referred to a spherical mirror) do (does) not ...

    Text Solution

    |

  17. Assertion : A single lens produces a coloured image of an object illum...

    Text Solution

    |