# Lesson 7— Loudness, amplitude and oscilloscopes — Online

The properties
of a wave
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Slide 1: Tekstslide
Natuurkunde / ScheikundeMiddelbare schoolhavo, vwoLeerjaar 2

In deze les zitten 27 slides, met tekstslides en 1 video.

## Onderdelen in deze les

The properties
of a wave

#### Slide 1 -Tekstslide

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

#### Slide 2 -Tekstslide

The properties of a wave

#### Slide 3 -Tekstslide

A wave
A repeating pattern

#### Slide 4 -Tekstslide

How many waves are there in the image below?

#### Slide 5 -Tekstslide

How many waves are there in the image below?
2 Waves

#### Slide 6 -Tekstslide

A wave has three properties

• Wavelength
• Amplitude
• Frequency

#### Slide 9 -Video

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

•  Wavelength
• Amplitude
• Frequency

#### Slide 10 -Tekstslide

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)

#### Slide 11 -Tekstslide

One block is 2 cm long
wavelength
•  8 cm

Amplitude
•  2 cm

Frequency
•  2 Hz

This snapshots has a duration of 1 second

#### Slide 12 -Tekstslide

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

#### Slide 13 -Tekstslide

(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

#### Slide 14 -Tekstslide

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

#### Slide 15 -Tekstslide

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

#### Slide 16 -Tekstslide

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

#### Slide 17 -Tekstslide

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

#### Slide 18 -Tekstslide

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

#### Slide 19 -Tekstslide

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

#### Slide 20 -Tekstslide

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

#### Slide 21 -Tekstslide

Question 4 — Which wave create a louder sound?
Wave 1
Wave 2

#### Slide 22 -Tekstslide

Question 5 — Which wave create a louder sound?
Wave 1
Wave 2

An oscilloscope

#### Slide 24 -Tekstslide

Amplification
The Amplitude of a wave...
...Determines the loudness of a sound

#### Slide 25 -Tekstslide

Working independently
Homework