Determine the wavelength (in nm) of an X-ray with a frequency of 4.2 × 10 18Hz.
a. 7.1 × 10 –11
b. 7.1 × 10 –2
c. 1.3 × 10 27
d. 1.4 × 10 10
e. 7.1 × 10 –18
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