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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at curved surface/LensEasy2 minPYQ_2020

PhysicsEasysingle choice

A transparent plastic bag filled with air forms a concave lens. Now, if this bag is completely immersed in water, then it behaves as

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Answer:

Solution:

In air $\frac{1}{f} = (μ_{p} - 1) (\frac{1}{R_{1}} - \frac{1}{R_{2}})$

In water $\frac{1}{f} = (\frac{μ_{p}}{μ_{ω}} - 1)$ $(\frac{1}{R_{1}} - \frac{1}{R_{2}})$

as retractive index of water is more than retractive index of plastic bag filled with air

$∴$ If behave as convergent lens

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

⏱ 2mℹ️ Source: PYQ_2020

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