Danger signals installed at airports and at the top of tall buildings all of red colour. These signals are visible from a distance. It is because

Danger signals installed at airports and at the top of tall buildings

1.	Danger signals installed at airports and at the top of tall buildings all of red colour. These signals are visible from a distance. It is because
Answer» red coloured light is scattered the most from atmosphere particles. red coloured light is scattered the least from atmosphere particles. red coloured light is absorbed most by smoke or fog present in atmosphere red coloured light suffers minimum deviation in hot AIR of atmosphere. Solution :Danger SIGNALS are usually of red colour because WAVELENGTH of red light is maximum and consequently red light is least scattered by the atmosphere. As a RESULT, the red coloured signal can be seen from a long distance.