## Chemistry (7th Edition)

$5.5×10^{-8}m$
Using the relation λ = $\frac{c}{ν}$, where λ is the wavelength, c is the speed, and ν is the frequency, we get : λ = $\frac{2.997925×10^{8}m/s}{5.5×10^{15}s^{-1}}$= $5.5\times10^{-8}m$