Home
Class 12
PHYSICS
Four convergent lenses have focal length...

Four convergent lenses have focal lengths 100 cm, 10 cm, 4 cm &0.3 cm. For a telescope with maximum possible magnification. We choose the lenses of focal lengths.

A

100 cm, 0.3 cm

B

10 cm, 0.3 cm

C

10 cm, 4 cm

D

100 cm, 4 cm

Text Solution

Verified by Experts

The correct Answer is:
A
`m = f_o/f_e` for m to be maximum `f_o` . should be maximum & `f_e` should be minimum. `f_0 = 100 cm, f_e = 0.3 cm`
Promotional Banner

Topper's Solved these Questions

  • NTA TPC JEE MAIN TEST 37

    NTA MOCK TESTS|Exercise PHYSICS |30 Videos

  • NTA TPC JEE MAIN TEST 40

    NTA MOCK TESTS|Exercise PHYSICS|30 Videos

Similar Questions

Explore conceptually related problems

Four convergent lenses have focal lengths 100cm, 10cm, 4cm and 0.3cm . For a telescope with maximum possible magnificaiton, we choose the lenses of focal lengths

Four convergent lenses have focal lengths 100 cm, 10 cm, 4 cm and 0.3 cm, for a telescope with maxiipum possible magnification we choose the lenses of following focal lengths

An astronomical telescope consists of two convex lenses of focal lengths 20 cm and 4 cm. For the nomal adjustment of the telescope, what is the angular magnification produced by the telescope ?

Arrange the following combinations in the increasing order of focal length a) Two piano convex lenses of focal lengths 20 cm and 30 cm in contact b) Two convex lens of focal lengths 20 cm and 10 cm in contact Two convex lenses of focal length 25 cm separated by 5 cm.

Arrange the following combinations in the increasing order of focal length Two piano convex lenses of focal lengths 15 cm and 30 cm in contact Two convex lens of focal lengths 40 cm and 50 cm in contact Two convex lenses of focal length 20 cm separated by 5 cm

Consider a 'beam expander' which consists of two converging lenses of focal length 40 cm and 100 cm having a common optical axis. A laser beam of diameter 4 mm is incident on the 40 cm focal length lens. Then what is the diameter of the final beam (see figure)

How would you combine two lenses of focal lengths 25 cm and 2.5 cm to make a telescope ? What is the magnifying power of this telescope ?

How would you combine two lenses of focal lengths 25 cm and 2.5 cm to make a telescope ? What is the magnifying power of this telescope ?

The focal length of the objective lens of a telescope is 50 cm If the magnification of the telescope is 25, then the focal length of the eye-piece is

NTA MOCK TESTS-NTA TPC JEE MAIN TEST 38-Physics
  1. Two wire have length 'l1' and 'l2' carries equal current Two circular...

    Text Solution

    |

  2. Match the combination of springs shown in Column 1 with their respecti...

    Text Solution

    |

  3. Let force F, length L and time T be taken as fundamental units, then w...

    Text Solution

    |

  4. Four convergent lenses have focal lengths 100 cm, 10 cm, 4 cm &0.3 cm....

    Text Solution

    |

  5. Position of center of mass of a body

    Text Solution

    |

  6. There is a liquid of mass m and specific heat capacity c and temperatu...

    Text Solution

    |

  7. An ideal monoatomic gas is taken round the cycle 12341 shown in the fi...

    Text Solution

    |

  8. A system performs work DeltaW when an amount of heat is DeltaQ added t...

    Text Solution

    |

  9. In a diffraction pattern due to a single slit of width 'a', the first ...

    Text Solution

    |

  10. Three identical small blocks are moving towards a wall with spacing be...

    Text Solution

    |

  11. Currents in a part of an electric circuit are shown in the figure belo...

    Text Solution

    |

  12. A parallel plate air capacitor has a capacitance C. The capacitor is h...

    Text Solution

    |

  13. Consider an elevator in a hospital. The elevator accelerates upward wi...

    Text Solution

    |

  14. The average force imparted on the wall when a 0.75 kg ball moving with...

    Text Solution

    |

  15. YDSE is conducted using light of wavelength 6000 Å to observe interfer...

    Text Solution

    |

  16. A gold sphere of radius 1 cm and density 19.2g//cm^3 with a concentric...

    Text Solution

    |

  17. Find ratio of surface tension of water to that of mercury if water ris...

    Text Solution

    |

  18. At what speed does the image of the boy will approach him in (ms^(-1))...

    Text Solution

    |

  19. A wheel of moment of inertia 3 kg m^2 rotates about an axis passing t...

    Text Solution

    |

  20. What is the work function of metal (in eV) if stopping potential and s...

    Text Solution

    |