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Physics - Geometrical Optics Question with Solution | TestHub

PhysicsGeometrical OpticsRefraction at curved surface/LensMedium2 minPYQ_2022

PhysicsMediumsingle choice

A biconvex lens has radii of curvature $20 cm$ each. If the refractive index of the material of the lens is $1.5$ , the power of the lens is:

Options:

Answer:

Solution:

Power of the lens is,

$P = \frac{1}{f} = (μ - 1) (\frac{1}{R_{1}} - \frac{1}{R_{2}}) \Rightarrow P = (1.5 - 1) (\frac{1}{0.2} - \frac{1}{- 0.2}) = 0.5 \times 10 \Rightarrow P = + 5 D$

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

⏱ 2mℹ️ Source: PYQ_2022

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