Answer: Blue end has shorter wavelength and red end has longer wavelengths.
Explanation:
Visible region consists of Violet, Indigo, Blue, Green, Yellow, Orange and Red. These colors are arranged in the order of increasing wavelengths which means that blue region has shorter wavelength and as we move towards red region, the wavelength of light increases.
Blue region has shorter wavelength and higher frequency whereas red region has longer wavelength and smaller frequency.
Frequency and wavelength follow inverse relation.
[tex]\nu\propto \frac{1}{\lambda}[/tex]
