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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at curved surface/LensMedium2 minPYQ_2007

PhysicsMediumsingle choice

Assertion : Goggles have zero power. Reason : Radius of curvature of both sides of lens is same

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Solution:

The focal length is given by $\frac{1}{f} = (μ - 1) (\frac{1}{R _{1}} - \frac{1}{R _{2}})$ . For goggle lenses, both sides are curved the same way. $R_{1}$ and $R_{2}$ are positive. If they are the same, $\frac{1}{f} = 0$ i.e. power is zero.

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

⏱ 2mℹ️ Source: PYQ_2007

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