Answer:
E) 314 nm
Explanation:
The relationship between speed, frequency and wavelength for an electromagnetic wave is given as:
             V = fλ
Where;
V is the speed of the wave
f is the frequency of the wave
λ is the wavelength.
Making λ the subject of the equation,
            λ = V/ f
            λ = 2.05 x 10^8 / 6.53 x 10^14
             = 3.14 x 10^-7 m
             = 314 x 10^-9 m
             = 314 nm
