Rocio enjoys star-gazing.When using a flashlight to look at her star chart on a dark but clear light, she should use a flashlight with ______.
A)red light because red light least interferes with scotopic vision
B)blue light because blue light has higher reflectance values
C)a broad range of wavelengths to compensate for the low ambient light level
D)green light, as green closely corresponds to the wavelengths emitted by stars

Question

Quizplus · Accepted Answer

Red light is the best choice because it least interferes with scotopic vision, which is the low-light vision utilized by the eyes for stargazing. This allows the eyes to remain adapted to the darkness and to see the faint stars more clearly. Blue or white light can be too bright and can overwhelm the eyes, making it more difficult to see the stars. A broad range of wavelengths or green light could also be a distraction and interfere with night vision.

Rocio Enjoys Star-Gazing