Compared to blue light, red light is scattered by fog/smoke
Question
Compared to blue light, red light is scattered by fog/smoke
much more strongly
much less (it is least scattered)
to exactly the same degree as blue light
not at all under any circumstances
Answer
much less (it is least scattered)
Detailed Explanation
The chapter states red light is least scattered by fog or smoke, which is why it remains visible at the same colour over a distance -- hence its use in danger signals.