Question

Which of the following quantity related to a lens depends upon the wavelength or wavelengths of incident light?

• A. Power
• B. Chromatic aberration
• C. Focal length
• D. All of the above

Answer 1

The correct option is D All of the above

The focal length of the lens varies directly with the wavelength of the light used and as wavelength is inversely related to refractive index, the focal length also varies inversely with it.
This is the principal cause of the phenomena of chromatic aberration.


And as focal length and power are inversely proportional to each other, the power, focal length and chromatic aberration of a lens depends upon the wavelength or wavelengths of incident light.

Hence, option $\left(d\right)$ is the correct answer.