Red light is sometimes used at night time because
A) It keeps vampires at by
B) only the rods can detect the red light
C) the cones can see the dim red light and the light causes minimal light adaptation of rods
D) None of the above

Question

Quizplus · Accepted Answer

Red light causes minimal adaptation of the rods in the eyes, which are responsible for vision in low light conditions. At night, using red light helps to maintain visual acuity while preserving the eyes' sensitivity to dim light levels. It is also less likely to disturb wildlife or affect night vision adaptation in other people around. Options A and B are not correct.

Red Light Is Sometimes Used at Night Time Because