Answer:
6.0 x 10^14 Hertz
Explanation:
The higher the frequency of a wave, the shorter the wavelength.
The lower the frequency of a wave, the longer the wavelength.
These waves are both light waves so no other factors will affect them since their other properties such as speed will all be the same. Due to this, the wave with the the lower frequency which is 6.0x10^14 hertz, will have the longer wavelength
