Give one common use of X-rays.

An X-ray wave has a wavelength of $0.06$ nanometres. Which of the following values is equal to $0.06$ nanometres?

• $$\begin{gathered} 6\times 10^{-11} \\ textm \end{gathered}$$
• $$\begin{gathered} 6\times 10^{-9} \\ textm \end{gathered}$$
• $$\begin{gathered} 6\times 10^{-12} \\ textm \end{gathered}$$
• $$\begin{gathered} 6\times 10^{-8} \\ textm \end{gathered}$$

The speed of electromagnetic waves in a vacuum is $$\begin{gathered} 3.0\times 10^8 \\ textm/s \end{gathered}$$. Calculate the frequency of this X-ray wave. Use your wavelength conversion from Part 2.