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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsOptical instrumentsMedium2 minQB

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The focal lengths of the eyepiece and objective of an astronomical telescope are 5 cm and 65 cm, respectively. The tube length is 69.5 cm. What is the angular magnification?

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Answer:

Solution:

Tube length $L = f_{o} + u_{e} \Rightarrow u_{e} = 69.5 - 65 = 4.5 cm$ . Angular magnification $m = f_{o} / u_{e} = 65/4.5 \approx 14.44$ .

Stream:JEESubject:PhysicsTopic:Geometrical OpticsSubtopic:Optical instruments

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