(5.2.2) Standing waves

Question 1

How do standing waves occur?

Answer 1

When progressive waves are reflected at a boundary

Question 2

What is a standing wave?

Answer 2

The superposition of 2 progressive waves with the same wave length but moving in opposite directions.

Question 3

Do standing waves transfer energy?

Answer 3

No

Question 4

What is a resonant frequency?

Answer 4

When the frequency of the applied force to an oscillating system is equal to its natural frequency. Leading to an increased amplitude.

Question 5

What is a node?

Answer 5

Where the amplitude of the vibration is zero.

Question 6

What is an antinode?

Answer 6

Points on the wave that display maximum amplitude.

Question 7

What’s the distance between a node and antinode?

Answer 7

A 1/4 of the wavelength

Question 8

What is the distance between 2 adjacent nodes?

Answer 8

Half a wavelength

Question 9

What is the fundamental frequency?

Answer 9

The lowest possible resonant frequency

Question 9

What’s the first harmonic?

Answer 9

Double the fundamental frequency

Question 10

What’s the lowest possible resonant frequency for length of a pipe?

Answer 10

1/4 of a wavelength

Question 11

What’s the lowest resonant frequency of an open end instrument?

Answer 11

1/2 a wavelength