blue coloured light is not suitable to be used as danger signals why
Answers
Answer:
Once again, driving provides a bit of an insight into why this colour is used. When you see blue while driving, it usually indicates a positive instruction; 'turn left ahead', for example, or 'one-way street'. These aren't warning of imminent dangers, just giving instructions to ensure a safer journey.
It is the same in the workplace. Blue does not elicit the same dramatic responses as 'danger' colours like red and yellow. It is fairly neutral in that respect. It is also one of the least visible colours from a distance. This makes it useful for positive instructions such as 'safety goggles must be worn' that are specific only to certain areas.
Because the red light has the largest wavelength of all colours, it is the least dispersed. Because of this, much of the light gets reflected back and can travel longer distances through clouds, fog, dust etc. to effectively enter our eyes.