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PhysicsNEET 2021Optical instruments: microscope and telescope

Ray Optics and Optical Instruments

A lens of large focal length and large aperture is best suited as an objective of an astronomical telescope since:

  1. A.A large aperture contributes to the quality and visibility of the images
  2. B.A large area of the objective ensures better light-gathering power
  3. C.A large aperture provides a better resolution
  4. D.All of the above✓

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