Light Science pp 25-49

# The Wave Nature of Light

• Thomas D. Rossing
• Christopher J. Chiaverina
Chapter

## Abstract

As was noted in Chap. , light exhibits a dual nature: At times, light behaves as a particle, and at other times, as a wave. In this chapter, we will examine the properties of waves and introduce the wave nature of light.

## Glossary of Terms

amplitude

Maximum displacement from equilibrium in a wave.

antinode

Point of maximum amplitude due to constructive interference.

dispersion

Variation in the speed of a wave with frequency (or wavelength). The spreading of light into a spectrum of different colors.

Doppler effect

Change in the frequency of waves due to motion of the source, the observer, or both.

frequency

Number of waves per second.

hertz

Unit of frequency; equals one wave per second.

interference

Superposition of two or more waves. Constructive interference occurs when the waves are in phase and therefore combine to form a larger wave; destructive interference occurs when the waves are out of phase and partially (or fully) cancel each other.

linear superposition

The resultant displacement of two waves at a point is the sum of the displacements that the two waves would separately produce at that point.

node

Point of minimum amplitude due to destructive interference of two waves.

standingwave

An interference pattern formed by two waves of the same frequency moving in opposite directions; the pattern has alternative minima (nodes) and maxima (antinodes).

wave equation

The relationship between wave speed, frequency, and wavelength: v = fλ.

wave model of light

Light consists of electromagnetic waves.

wavelength

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4. Rossing, T. D., Moore, F. R., & Wheeler, P. A. (2001). The Science of Sound, 3rd ed. Reading, MA: Addison-Wesley.Google Scholar

© Springer Nature Switzerland AG 2019

## Authors and Affiliations

• Thomas D. Rossing
• 1
Email author
• Christopher J. Chiaverina
• 2
1. 1.Department of Music, Center for Computer Research in Music and Acoustics (CCRMA)Stanford UniversityStanfordUSA
2. 2.New Trier Township High SchoolWinnetkaUSA