Question

What is the wavelength that corresponds to a frequency of 6.00x1014 hz?

Answer 1

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