it is a word spelled as wavelength not wavelegnth =)
The longest visible wavelengths are red,
Red is longest, violet the shortest,.
Red light has the longest wavelength among the visible colors of light.
Red
Red.
Red is the longest wavelength of visible light
Red.
Red
The longest visible wavelength is that of the last color you can see on the redend of the rainbow. It's not exactly the same for every eye of every person.
Red color in the visible spectrum has longest wavelength.
Red has the longest wavelength in the visible spectrum of light.