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Class 12PhysicsRay Optics and Optical InstrumentsTelescope
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All of the following statements are correct except:

  • A
    The total length of an astronomical telescope is the sum of the focal lengths of its two lenses.
  • B
    The image formed by the astronomical telescope is always erect because the effect of the combination of the two lenses is divergent.
  • C
    The magnification of an astronomical telescope can be increased by decreasing the focal length of the eye-piece.
  • D
    The magnifying power of the refracting type of astronomical telescope is the ratio of the focal length of the objective to that of the eye-piece.
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Class 12

Physics Questions

Chapter

Ray Optics and Optical Instruments

Subtopic

Telescope

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