Home
Class 11
PHYSICS
For a given compound microscope, increas...

For a given compound microscope, increase in length of tube

A

increases magnifying power.

B

has no effect on magnifying power.

C

decreases magnifying power.

D

doubles the magnifying power.

Text Solution

Verified by Experts

Promotional Banner

Topper's Solved these Questions

  • Motion in a plane

    TARGET PUBLICATION|Exercise Exercise|340 Videos

  • RAY OPTICS

    TARGET PUBLICATION|Exercise EVALUATION TEST|16 Videos

Similar Questions

Explore conceptually related problems

Compound microscope is NOT used in

The compound microscope is used to see

In a compound microscope, the intermediate image is

In compound microscope, the focal length and aperture of the objective used is respectively

Answer the given question : When will you use a simple microscope and when, a compound microscope? Explain in detail how you will use them.

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 the nature of the final image in a compound microscope relative to the object ?

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. In a compound microscope , which lens has greater focal length ?

True / False: In the compound microscope, two concave lenses are used

Collect different water samples of fresh water. Mount them on a glass slide and observe under a compound microscope. Try to identify the organisms which are visible under it.

Magnification of compound microscope is not connected with

TARGET PUBLICATION-OPTICS-EXERCISE
  1. Assertion : If objective and eye lens of a mcroscope are interchanged ...

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

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

    Text Solution

    |

  8. A light ray enters a solid glass sphere of refractive index sqrt3 at a...

    Text Solution

    |

  9. A telescope using an eye piece of focal length 2 cm has a magnificatio...

    Text Solution

    |

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

    Text Solution

    |

  11. In optical fibre, assuming, the cladding is uniform, light is transmi...

    Text Solution

    |

  12. Light propagates 4 cm distance in glass of refractive index 1.5 in tim...

    Text Solution

    |

  13. A transparent solid cylindrical rod has a refractive index of (frac(2)...

    Text Solution

    |

  14. A beam of light consisting of red, and blue colours is incident on a r...

    Text Solution

    |

  15. A light ray is incident normally on the face AB of a right-angled pris...

    Text Solution

    |

  16. Diamond is optically more dense than water because

    Text Solution

    |

  17. Critical angle of glass is theta(1) and that of water is theta(2). The...

    Text Solution

    |

  18. The value of critical angle is least for which of the following colour...

    Text Solution

    |

  19. The angular dispersion produced by a small angle prism placed in air

    Text Solution

    |

  20. Assertion: The rainbow is seen sometimes in the sky when it is raining...

    Text Solution

    |