The Department of Transportation contacts you and asks what colour they should make their road signs so that they will be most visible at night. Given what you have learned in this class about the sensitivity of rods under conditions of low illumination, one colour
That you would NOT want to pick is:

Question

Quizplus · Accepted Answer

Rods, which are responsible for vision in low light, are not sensitive to red light, making red a poor choice for visibility at night.

The Department of Transportation Contacts You and Asks What Colour