To convert the number \(0.0000000065\) meters into scientific notation, you can rewrite it in the form of \(a \times 10^n\), where \(1 \leq a < 10\) and \(n\) is an integer.
The number \(0.0000000065\) can be expressed as \(6.5\) multiplied by \(10^{-9}\) (since moving the decimal point 9 places to the right will give us \(6.5\)).
Thus, in scientific notation, the wavelength of the X-ray is:
\[ 6.5 \times 10^{-9} \text{ meters} \]
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