Ruben's Tube and Camera Obscura

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What decibel level becomes painful to humans

130

Typical Human Hearing Falls Between

20 HZ and 20,000 HZ

When light has lower frequency, it's more

Blueshift

Sound is made of

Compressions and rarefactions

When two waves meet and their amplitudes temporarily combine to make a larger amplitude

Constructive Interference

When two waves meet and their amplitudes temporarily cancel out and make a smaller amplitude

Destructive Interference

Which best describes the pressure in a compression?

High Pressure

Volume

How loud a sound is PERCEIVED

What is it called when two waves meet when traveling along the same medium?

Interference

What happens when a wave pulse is reflected off a fixed position?

It goes back on the opposite side

The doppler effect works not only on sound but also on

Light

What kind of wave is sound?

Longitudinal, Mechanical

Which best describes the pressure in a rarefaction?

Low Pressure

Frequency

Number of waves per second

What does the frequency of a sound tell you about the sound?

Pitch

Pitch

Quality of a sound

When light has higher frequency, it's more

Redshift

Rarefactions and Compressions travel within

Sound

A combination of two waves meeting in opposite directions

Standing Wave

A pattern formed when a wave is bouncing back and forth in an environment

Standing Wave

Each time we go up by ten on the decibel scale, we double

The Volume

How does the doppler effect change the frequency of a sound when the observer is behind the moving object?

The observed frequency is decreased (the wavelengths are increased)

How does the doppler effect change the frequency of a sound when the observer is in front of the moving object?

The observed frequency is increased (the wavelengths are decreased)

The Doppler Effect is observed when

The source of a wave is moving with respect to the observer

What happens after two waves meet in a medium?

They pass through one another

What has to happen for a sound to be made?

Vibrations

What does the amplitude of a sound tell you about the sound?

Volume

How is a continuous standing wave formed?

When the two interferences meet and cancel each other out

Sound needs a medium to

compress

Sound begins with

vibration


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