Physics - Geometrical Optics Question with Solution | TestHub
PhysicsGeometrical OpticsOptical instrumentsMedium2 minQB
PhysicsMediumsingle choice
In a telescope, a converging lens of focal length is inserted in between the objective and the eyepiece without changing the overall angular magnification magnitude, so that the observer sees an erect image of the object. The length of the telescope tube is
Options:
Answer:
B
Solution:
To erect the image without changing , the inserted lens must give magnification -1 . That needs object and image each at from the lens, so the tube lengthens by .
Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Optical instruments
⏱ 2mℹ️ Source: QB
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