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  4. The intensity of X -rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is λc and the wavelength of the Kα line is λk. As the accelerating voltage is increased

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Q. The intensity of $X$ -rays from a Coolidge tube is plotted against wavelength as shown in the figure. The minimum wavelength found is $\lambda_{c}$ and the wavelength of the $K_{\alpha}$ line is $\lambda_{k}$. As the accelerating voltage is increasedPhysics Question Image

Dual Nature of Radiation and Matter

Solution:

Wavelength $\lambda_{K}$ is independent of the accelerating voltage $(V)$, while the minimum wavelength $\lambda_{C}$ is inversely proportional to $V$. Therefore as $V$ increases, $\lambda_{k}$ remains unchanged whereas $\lambda_{c}$ decreases or $\lambda_{k}-\lambda_{c}$ will increase.