Standing Waves and Harmonics Concepts

What type of wave is sound?

• Light wave

• Longitudinal wave

• Transverse wave

• Electromagnetic wave

Standing waves are formed when two other wave behaviors happen. What are these two behaviors?

• Refraction and diffraction

• Reflection and absorption

• Reflection and interference

• Interference and diffraction

What are the points on a standing wave that do not move called?

• Antinodes

• Crests

• Troughs

• Nodes

What is the simplest type of standing wave, also known as the 1st harmonic, called?

• Overtone

• Fundamental

• Resonance

• Amplitude

What is the relationship between the frequency of a harmonic and the fundamental frequency for a string with two fixed ends?

• The harmonic frequency is half the fundamental frequency.

• The harmonic frequency is equal to the fundamental frequency.

• The harmonic frequency is the harmonic number multiplied by the fundamental frequency.

• The harmonic frequency is the harmonic number divided by the fundamental frequency.

How do musical instruments like pianos and guitars change the note they play?

• By changing the color of the strings.

• By changing the length of the active part of the string.

• By changing the material of the instrument.

• By changing the temperature of the room.

What is found at the open end of a pipe when a standing wave is created?

• A node, where air molecules do not move.

• An antinode, where air molecules move the most.

• A fixed point, like on a string.

• A closed end, where air molecules are still.

Which type of harmonics cannot be created in a pipe that is closed on one end?

• Odd-numbered harmonics.

• Even-numbered harmonics.

• Fundamental harmonics.

• All harmonics can be created.