Answer
Maximum: $5.0\times10^{4}eV$
Minimum: $6\times10^{3}eV$
Work Step by Step
The smallest wavelength x-ray has the most energy. From the figure, that is about 0.025 nm.
In this problem, the value of hc is useful. Use the result stated in Chapter 27, Problem 29, $hc=1240\;eV \cdot nm$.
Use equation 27–4, E = hf, and recall that $\lambda f = c$.
$$E = hf = \frac{hc}{\lambda }=\frac{1240\;eV \cdot nm }{0.025 nm}=5.0\times10^{4}eV$$
The longest wavelength x-ray has the least energy. From the figure, that is about 0.2 nm.
$$E = hf = \frac{hc}{\lambda }=\frac{1240\;eV \cdot nm }{0.2 nm}=6\times10^{3}eV$$
