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Visual and auditory stimuli occur as waves. 

Waves in Sensation and Perception within Psychology

Visual stimuli (light) and auditory stimuli (sound) are both transmitted as wave forms. These waves are defined by specific physical characteristics, most notably their amplitude, wavelength, and timbre.

Physical Characteristics of Waves in Sensation and Perception

The two types of waves for perception are: 

1. Light Waves (Visual Stimuli) 
2. Sound Waves (Auditory Waves) 

Types of Waves

The electromagnetic spectrum is the complete range of electromagnetic radiation in the environment, organized by wavelength and frequency. It includes gamma rays, X-rays, ultraviolet light, visible light (which occupies a relatively small range of frequencies between infrared and ultraviolet), infrared light, microwaves, and radio waves.

Classification of the Electromagnetic Spectrum

A researcher is comparing the physical nature of the stimuli responsible for the senses of sight and hearing. What is the most fundamental characteristic that the physical stimuli for *both* of these senses share, which distinguishes them from the stimulus for the sense of touch?

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