A combination of the two thin lenses of the same material with focal length, $f_{1}$ and $f_{2}$ are arranged on a common axis. In order to minimize the chromatic aberration, the distance between them should be :

Question

A combination of the two thin lenses of the same material with focal length,

f_{1}

and

f_{2}

are arranged on a common axis. In order to minimize the chromatic aberration, the distance between them should be :

Toppr Admin · Accepted Answer

To minimize chromatic aberration the distance between two lenses is the average of there focal length- So- here given focal length are f1-xA0-and-xA0-f2-xA0-So- faverage-f1-f22-

A combination of the two thin lenses of the same material with focal length, f1 and f2 are arranged on a common axis. In order to minimize the chromatic aberration, the distance between them should be :(f1+f2)2(f1+f2)4(f1+f2)2(f1+f2)

To minimize chromatic aberration the distance between two lenses is the average of there focal length. So, here given focal length are f1 and f2. So, faverage=f1+f22.

To minimize chromatic aberration the distance between two lenses is the average of there focal length. So, here given focal length are $f_{1} a n d f_{2}$ .
So, $f_{a v e r a g e} = \frac{f_{1} + f_{2}}{2}$ .