12.4-12.6 Stationary Waves Harmonics Quizlet Cards Flashcards Preview

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Flashcards in 12.4-12.6 Stationary Waves Harmonics Quizlet Cards Deck (17)
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1

What are the condition required for a stationary wave to form?

Two waves travelling/propagating in opposite directions superpose with the same frequency and similar amplitudes

2

What is an anti-node on a stationary wave?

A point where the progressive waves are in phase and constructively interfering resulting in maximum amplitude

3

What is an node on a stationary wave?

A point where the progressive waves are in antiphase and are destructively interfering resulting in minimum amplitude

4

How many wavelengths are there between adjacent nodes of a standing wave?

Half a wavelength

5

What is the phase difference between points either side of a node?

Pi Rad/180 degrees

6

What is the phase difference of points between two adjacent nodes?

Zero

7

How does phase vary along a progressive wave?

Changes continuously across each wave cycle.

8

How does amplitude vary in a stationary wave?

It varies continuously along the wave. It is a maximum at antinodes and a minimum at nodes.

9

How does amplitude vary in a progressive wave?

It is the same at every point along the wave.

10

What type of wave doesn't transfer energy?

Stationary waves

11

What is the fundamental frequency of a string?

The lowest frequency which produces a stationary wave on the string.

12

What factors determine the fundamental frequency on a string

Length, tension and the thickness of the string.

13

What determines the pitch produced by a stationary wave in a musical instrument?

The frequency of the 1st harmonic

14

What determines the loudness of sound?

The amplitude of the sound wave

15

Why can only certain frequency stationary waves be produced on a stretched string?

There must be nodes at the fixed ends and only certain frequencies/wavelengths allow this.

16

What feature of a stationary wave is always formed at an open end of a tube?

(Displacement) Anti-node

17

What feature of a stationary wave is always formed at a closed end of a tube?

(Displacement) Node