Home
Class 11
PHYSICS
A Galileo telescope has an objective of...

A Galileo telescope has an objective of focal length `100cm` and magnifying power 50. The distance between the two lenses in normal adjustment will be

A

150 cm

B

100 cm

C

98 cm

D

200 cm

Text Solution

Verified by Experts

The correct Answer is:
C
In normal adjustment
`m=(f_(0))/(f_(theta))`
so, `50=100/(f_(theta))=f_(theta)=2 cm`
(`:'` eyeplace is concave lens)
and `L=f_(0)-f_(theta)=100-2 =98 cm`
Promotional Banner

Topper's Solved these Questions

Similar Questions

Explore conceptually related problems

A compound microscope has an objective of focal length 2 cm and eye-piece of focal length 5 cm. The distance between the two lenses is 25 cm. If the final image is at a distance of 25 cm from the eye-piece, find the magnifying power of the microscope. What would be the magnifying power if the microscope were reversed ?

A telescope uses an objective lens of focal length f_0 and an eye lens of focal length f_e . In normal adjustment, distance between the two lenses is.

A Galilean telescope has objective and eyepiece of focal lengths 200 cm and 2cm respectively. The magnifying power of the telescope for normal vision is

A Galilean telescope has objective and eye - piece of focal lengths 200 cm and 2cm respectively. The magnifying power of the telescope for normal vision is

A small telescope has an objective lens of focal length 150 cm and an eye piece of focal length 6.0 cm. The magnifying power of the telescope for distinct vision adjustment is:

A small telescope has an objective lens of focal length 140 cm and eye piece of focal length 5.0 cm . What is the magnifying power of telescope for viewing distant objects when (a) the telescope is in normal adjustment (i.e. when the image is at infinity) (b) the final image is formed at the least distance of distinct vision (25 cm) .

A telescope has an objective of focal length 100 cm and an eye-piece of focal length 5 cm. What is the magnifying power of the telescope when it is in normal adjustment?

A telescope consists of an objective of focal length 50 cm and an eyepiece of focal length 5 cm. In normal adjustment of the telescope, what will be (i) the magnifying power and (ii) the length of the telescope.

RESONANCE-GEOMETRICAL OPTICS-Exercise
  1. A light wave travels from glass to water. The refractive index for gla...

    Text Solution

    |

  2. When a beam of light goes from denser medium (mud) to rarer medium (mu...

    Text Solution

    |

  3. The image for the converging beam after refraction through the curved ...

    Text Solution

    |

  4. A thin linear object of size 1mm is kept along the principal axis of a...

    Text Solution

    |

  5. A medium has nv = 1.56, nr=1.44. Then its dispersive power is:

    Text Solution

    |

  6. A Galileo telescope has an objective of focal length 100cm and magnif...

    Text Solution

    |

  7. A convex lens of focal length A and a concave lens of focal length B a...

    Text Solution

    |

  8. Two thin lenses of focal lengths 20cm and 25cm are placed in contact. ...

    Text Solution

    |

  9. When the distance between the object and the screen is more than 4 f....

    Text Solution

    |

  10. A plano convex lens is made of glass of refractive index 1.5. The radi...

    Text Solution

    |

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

    Text Solution

    |

  12. In order to increase the magnifying power of a telescope

    Text Solution

    |

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

    Text Solution

    |

  14. The numerical value of the length of Galilean telescope for normal vis...

    Text Solution

    |

  15. The magnifying power of compound microscope in terms of the magnificat...

    Text Solution

    |

  16. In a simple microscope, if the final image is located at infinity then...

    Text Solution

    |

  17. To remove the chromatic aberration, the combination of lenses should ...

    Text Solution

    |

  18. With a simple microscope, if the final image is located at the least d...

    Text Solution

    |

  19. STATEMENT -1: There exists two angles of incidence for the same deviat...

    Text Solution

    |

  20. STATEMENT-1: A lens has two principal focal lengths which may be diffe...

    Text Solution

    |