SOUND AND LIGHT Chapter 1 THE ENERGY OF WAVES

Section 2 Properties of Waves

amplitude the maximum distance the wave vibrates from its rest position

The larger the amplitude, the _____ the wave and the _______ the energy. greater taller

position where the particles of a medium stay when there is no disturbance rest position

the distance between any two adjacent crests, compressions, troughs, or rarefactions in a series of waves wavelength Crest

Wavelengths in Motion

the number of waves produced in a given amount of time frequency Wavelength

A higher frequency wave carries _____ energy than a _____ frequency wave. more lower

term used to express frequency hertz (Hz)

Waves can have the same frequency but differing amplitudes.

It takes _____ energy to vibrate a rope slowly than to vibrate a rope ______. less quickly

speed at which a wave travels wave speed

The speed of a wave depends on the ________ in which the wave is traveling. medium

Use the chart to make generalizations.

Sound waves travel through ___ at 340m/s and in _____ at 5,200m/s. air steel

formula used to calculate wave speed v=λ x f

In the formula v = λ x f v = λ= f = frequency wavelength wave speed (velocity)

Find the wave speed. Use the formula: v = λ x f if wavelength is 0.4m and frequency is 2 Hz wave speed = 0.8m/s v = 0.4m x 2Hz v = 0.8

Find the wavelength. Use the Formula: λ = v/f if wave speed is 20m/s and frequency is 5 Hz (5 per second) wavelength = 4m λ = 20m/s divided by 5 Hz λ = 20m x 1s = 20ms s 5 5s λ = 4m

SONAR stands for sound navigation and ranging

a wave in which the particles vibrate with an up-and-down motion, perpendicular to the direction in which the wave is traveling transverse wave

wave in which the particles move back and forth along the path that the wave travels longitudinal wave

Fun and Games Introduction to Waves Parts of a Wave Vocabulary Games Animations NASA Science Files Kids Work Wave Speed Interactive Site with Quiz BBC