Unit 14: Waves, Sound, and Physical Optics

Waves transfer ______ between two locations.

Energy

Wave Pulse

A single disturbance that transfers energy without transferring matter

How does a wave move?

By propagating (to move through)

Mechanical Waves

Requires a medium to move through

Electromagnetic Waves

Doesn’t require a medium to move through

Longitudinal Waves

The motion of the medium is parallel to the wave

Transverve Waves

The motion of the medium is perpendicular to the wave

____________ waves only happen in mechanical waves.

Longitudinal

Parts of a Longitudinal Wave

Parts of a Transverse Wave

What does the speed of a wave depend on?

• Tension (F_T) - increasing tension increases speed

• Linear density (kg/m) - decreasing linear density increases speed

Sound waves travel fastest when in a ____ climate not a ____ climate.

Warm; Cold

Amplitude

Maximum displacement of a wave, wave pulse, or oscillation from its equilibrium position

Amplitude is based off of ________.

Pressure

The higher the amplitude, the ______ the sound in a sound wave.

Louder

The higher the amplitude, the ______ of light in a light wave.

Brighter

The speed of a wave depends on the _______.

Medium

A single point on a periodic wave moves a distance of ____ amplitudes.

Four (4)

Does amplitude affect wave speed?

No

How are energy (E) and amplitude (A) related?

E = A²