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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsOptical instrumentsEasy2 minPYQ_2020

PhysicsEasysingle choice

An astronomical telescope has objective and eye-piece lenses of powers $0.5 D$ and $20 D$ respectively. The magnifying power of the Telescope is

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Answer:

Solution:

Given , the power of objective lens,

$P_{0} = 0.5 D$

The power of eye-piece lens,

$P_{e} = 20 D$

The magnifying power of an astronomical telescope

$M = \frac{f_{0}}{f_{e}}$

$o r M = \frac{P_{e}}{P_{0}} (∴ P = \frac{1}{f})$

$= \frac{20}{0.5} = 40$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Geometrical OpticsSubtopic:Optical instruments

⏱ 2mℹ️ Source: PYQ_2020

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