A large magnification can be achieved in an astronomical telescope by taking an objective lens of highest possible focal length and an eyepiece of least possible focal length.
Class 12 Physics Chapter 9 Ray Optics and Optical Instruments Session 2024-2025.
State the condition under which a large magnification can be achieved in an astronomical telescope.
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A large magnification in an astronomical telescope can be achieved when the objective lens has a long focal length, and the eyepiece has a short focal length. This increases the ratio of the objective’s focal length to the eyepiece’s focal length, enhancing magnification.
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