Why the ‘danger’ signal lights are red in colour?
Answer & explanation
Correct answer: option 2
The ‘danger’ signal lights are red in colour. The red is least scattered by fog or smoke. Therefore, it can be seen in the same colour at a distance.
Why the ‘danger’ signal lights are red in colour?
Correct answer: option 2
The ‘danger’ signal lights are red in colour. The red is least scattered by fog or smoke. Therefore, it can be seen in the same colour at a distance.