Question

Blue coloured light is not suitable to be used as danger signals. Write the
reason.​

Answer 1

Answer:

because it has low wavelenght and red colour have high wavelenght it's seen from large distance even at fog or night

Answer 2

Answer:

The effect of scattering is inversely related to the fourth power of the wavelength of a colour. Therefore blue which has the least wavelength of all the visible radiations is scattered the most and red which has the highest wavelength of all the colours we can see is scattered the least.