Which of the following is a correct pairing of a physical signal with its perceptual modality?

• A. Light (vision)
• B. Air vibrations (taste)
• C. Physical pressure (vision)
• D. Body position (olfaction)

Answer: (A)

Physical signals are detected by dedicated sensory receptors that convert energy into neural signals for a specific sense. Light is electromagnetic energy captured by photoreceptors in the retina, which gives us vision. Air vibrations are sound waves that stimulate the auditory system, not taste. Physical pressure is a mechanical cue detected by touch receptors, not vision. Body position is monitored by proprioceptors, not olfactory receptors. So pairing light with vision is the correct match because vision arises from the detection of light by the eyes.