Answer :
Wavelength and Frequency:
The relationship between wavelength and frequency of light is inversely proportional.
Mathematically,
[tex]\lambda=\frac{c}{f}[/tex]Where λ is the wavelength, f is the frequency, and c is the speed of light.
The speed of light is 3×10⁸ m/s
For the given case, the frequency is 4.40×10¹⁴ Hz
[tex]\lambda=\frac{c}{f}=\frac{3.0\times10^8}{4.40\times10^{14}}=6.81\times10^{-7}\; m[/tex]Therefore, the wavelength of the red stop light is 6.81×10⁻⁷ m