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(B) The minimum wavelength (cutoff wavelength) of $X$-rays is given by the Duane-Hunt law: $\lambda_{\min} = \frac{hc}{eV}$.Here, $h$ is Planck's cons

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Voltage applied to the tube

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(B) The minimum wavelength (cutoff wavelength) of $X$-rays is given by the Duane-Hunt law: $\lambda_{\min} = \frac{hc}{eV}$.Here, $h$ is Planck's constant, $c$ is the speed of light, $e$ is the charge of an electron, and $V$ is the accelerating potential difference (voltage) applied across the tube.From the formula, it is clear that $\lambda_{\min} \propto \frac{1}{V}$.Therefore, the minimum wavelength depends only on the voltage applied to the tube.

The minimum wavelength of $X$-rays produced by an $X$-ray tube depends on which of the following?

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