Question

the wavelength of blue light is greater than the wavelength of the Other colours

Answer 1

This is because at the sunrise and sunset the wavelengths associated with red and orange colours are not properly scattered by the atmosphere than the wavelength of other colours (like blue and purple). Wavelength of Yellow Light : The yellow light has a wavelength of about 570 nm.

Answer 2

The wavelength of blue light is greater than the wavelength of the Other colours and due to this the colour of sky is generally blue