Cone spectral sensitivity is measured by having the observer _____.
A) look up and blink
B) look straight forward without blinking
C) look directly into a light
D) look to the side of a flashing light

Question

Quizplus · Accepted Answer

Cone spectral sensitivity is measured by having the observer look directly into a light because cones are concentrated in the central part of the retina (fovea), which is used for direct vision.

Cone Spectral Sensitivity Is Measured by Having the Observer _____