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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsOptical instrumentsEasy2 minPYQ_2020

PhysicsEasysingle choice

The focal length of a simple convex lens used as a magnifier is $10 c m$ . For the image to be formed at a distance of distinct vision $D = 25 c m$ , the object must be placed away from the lens nearly at a distance of

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Answer:

Solution:

$f = + 10 cm.$

$v = 25 cm.$

$\frac{1}{v} - \frac{1}{u} = \frac{1}{f}$

$\frac{1}{25} - \frac{1}{u} = \frac{1}{10}$

$\frac{10 - 25}{250} = \frac{1}{u}$

$u = 16 cm$

Stream:NTA_ABHYAS_NEETSubject:PhysicsTopic:Geometrical OpticsSubtopic:Optical instruments

⏱ 2mℹ️ Source: PYQ_2020

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