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(D) The refractive index $(n)$ of a material depends on the wavelength $(\lambda)$ of the incident light, a phenomenon known as dispersion. According

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(D) The refractive index $(n)$ of a material depends on the wavelength $(\lambda)$ of the incident light, a phenomenon known as dispersion. According to Cauchy's equation, $n(\lambda) = A + B/\lambda^2 + C/\lambda^4 + ...$, where $A, B, C$ are constants.Since the focal length $(f)$ of a lens is given by the Lens Maker's Formula: $\frac{1}{f} = (n - 1) \left( \frac{1}{R_1} - \frac{1}{R_2} \right)$, it follows that $f$ also depends on the wavelength $\lambda$ because $n$ depends on $\lambda$.Power $(P)$ of a lens is defined as $P = \frac{1}{f}$. Since $f$ depends on $\lambda$, the power $P$ also depends on the wavelength $\lambda$.Therefore, all the given quantities (refractive index, focal length, and power) depend on the wavelength of the incident light.

Which of the following quantities related to a lens depend on the wavelength of the incident light?

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