The basic relationship between wavelength [tex]\lambda[/tex], frequency f and speed c of an electromagnetic wave is
[tex]\lambda= \frac{c}{f} [/tex]
where c is the speed of light. Substituting numbers, we find:
[tex]\lambda= \frac{c}{f}= \frac{3 \cdot 10^8 m/s}{6.0 \cdot 10^{14} Hz}=5\cdot 10^{-7} m [/tex]
