Lesson 7— Loudness, amplitude and oscilloscopes — Online

• Natuurkunde / Scheikunde
• Middelbare school
• havo, vwo
• Leerjaar 2

The properties 

of a wave

Learning goals

• Name and describe the three properties of a wave
  

• Name what affects the loudness of a sound
  

• Be able to read waves from an oscilloscope
  

The properties of a wave

A wave

A repeating pattern

How many waves are there in the image below?

How many waves are there in the image below?

2 Waves

A wave has three properties

• Wavelength
  
• Amplitude
  
• Frequency
  

Exercise

Explain the three properties of a wave in your own words. Also name their unit.

•  Wavelength
• Amplitude
• Frequency
  

Wavelength

The length of a wave (in cm, m, km)

Amplitude

The distance from the center of the wave to top or bottom (in cm, m, km)

Frequency

The amount of waves per second (in hertz, Hz)

One block is 2 cm long

wavelength

•  8 cm

Amplitude

•  2 cm

Frequency

•  2 Hz

This snapshots has a duration of 1 second 

One block is 2 cm long

wavelength

•  8 cm

Amplitude

•  2 cm

Frequency

•  2 Hz

This snapshots a duration of 1 second

This snapshots has a duration of 1 second 

(in cm, m, km)

One block is 2 cm long

wavelength

•  8 cm

Amplitude

•  2 cm

Frequency

•  2 Hz

This snapshots a duration of 1 second

This snapshots has a duration of 1 second 

One block is 2 cm long

wavelength

•  8 cm

Amplitude

•  2 cm

Frequency

•  2 Hz

This snapshots a duration of 1 second

2 Waves per second

This snapshots has a duration of 1 second 

Question 1 — How many waves are there in the image below?

Question 2 — How many waves are there in the image below?

4 Waves

Question 2

a) What is the wavelength the waves in this image?

b) What is the amplitude of these waves?

c) What is the frequency of this signal?

One block is 2 cm long

This snapshots has a duration of 1 second 

Question 3

a) Wave length:

3.2 Cm

b) Amplitude

1 cm

c) Frequency

5 Hz

One block is 2 cm long

This snapshots has a duration of 1 second 

Question 3

Which of the three properties of a wave affects the loudness of the sound it produces?

A) The frequency

B) The wavelength

C) The Amplitude

Question 4)

Which of the three properties of a wave affects the loudness of the sound it produces?

A) The frequency

B) The wavelength

C) The Amplitude

Question 4 — Which wave create a louder sound?

Wave 1

Wave 2

Question 5 — Which wave create a louder sound?

Wave 1

Wave 2

An oscilloscope

Link

Amplification

The Amplitude of a wave...

...Determines the loudness of a sound

Working independently

Homework

Read: 5.5

Do: 5.4 The workbook exercises

Learning goals

• Name and describe the three properties of a wave
  

• Name what affects the loudness of a sound
  

• Be able to read waves from an oscilloscope