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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsOptical instrumentsEasy2 minPYQ_2020

PhysicsEasysingle choice

A simple telescope consisting of an objective lens of focal length $60 c m$ and an eye lens of focal length $5 c m$ , is focused on a distant object. If the object subtends an angle of $2 °$ at the objective lens, the angular width of the image is

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Answer:

Solution:

Magnifying power for normal adjustment (distant object) is given by,

$M . P . = \frac{β}{α} = \frac{f_{o}}{f_{e}}$

$\Rightarrow \frac{β}{2} = \frac{60}{5}$

$\Rightarrow β = 24 °$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Geometrical OpticsSubtopic:Optical instruments

⏱ 2mℹ️ Source: PYQ_2020

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