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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at curved surface/LensMedium2 minPYQ_2018

PhysicsMediumsingle choice

If focal length of human eye is $2 cm$ , then find the focal length of contact lens, such that a combined focus system of focal length $2.5 cm$ is obtained after using contact lens.

Options:

Answer:

Solution:

$() : P_{net} = P_{eye} + P_{lens} \frac{1}{f _{net}} = \frac{1}{f _{eye}} + \frac{1}{f _{lens}} \frac{1}{2.5} = \frac{1}{2} + \frac{1}{f _{lens}} or f_{lens} = - 10 cm$

Stream:AIIMSSubject:PhysicsTopic:Geometrical OpticsSubtopic:Refraction at curved surface/Lens

⏱ 2mℹ️ Source: PYQ_2018

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