Answer: 1119 namometers
Step-by-step explanation:
Since all electromagnetic waves travel at the speed of light in a vacum the following equation can be used .
λ·ν = c
λ is wavelength and ν is frequency. c is the speed of light. Then:
λ·(2.68×10^14Hz) = 3.00 x 10^m/s
λ = 1119 nm