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Chromatic Aberrations

For which of ...

Question

For which of the two lenses $L_{1}$ and $L_{2}$ the chromatic aberration will be more if the radii of curvature of the surfaces of $L_{1}$ are less than those of $L_{2}$ :

A

L_{1}

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B

L_{2}

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C

L_{1} = L_{2}

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D

none of the above

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Solution

The correct option is B $L_{2}$
We know that the focal length of a lens $f \propto R$ where R=radius of curvature of surfaces of lens

And, chromatic aberration $\propto f$

Hence, larger the radius more will be chromatic aberration.

And, radius of curvature of surface is more for $L_{2}$ .

Hence chromatic aberration will be more for $L_{2}$

Answer-(B)

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