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 $L_{2}$ :

Question

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Answer 1

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)

Answer 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)