Wave Properties and the Light Equations Lesson

Waves Properties

Lawrence January 2022

​Vocab

Wave Longitudinal waves

Crest​ Transverse waves

Trough Mechanical Waves

Amplitude​ Electromagnetic waves

Wavelength

Frequency​

Wave spee​

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A disturbance that carries energy

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Wave

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Types of waves

Mechanical Waves

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Electromagnetic Waves​

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Travel through a medium such as air or water.

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​Mechanical Waves

Any form of matter such as air, water, and solids.

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Medium

Ocean Waves

Seismic waves

Sound waves​

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Types of mechanical waves

Two waves

Electrical and magnetic​

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Electromagnetic Waves

Do not need a medium to travel

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Electromagnetic Waves

Travel at the speed of light

300,000,000 m/s

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Electromagnetic Waves

Radio waves

Micro waves

Infrared wave

Light

Ultraviolet

X-rays​

Gamma Rays​

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​Types of EM waves

Multiple Choice

What is a disturbance that carries energy?

¿Qué es una perturbación que transporta energía?

• Motion

• Force

• Wave

Multiple Choice

What type of wave?

• Mechanical Wave

• Electromagnetic Wave

Multiple Choice

What type of wave?

• Mechanical Wave

• Electromagnetic Wave

Multiple Choice

What type of wave?

• Mechanical Wave

• Electromagnetic Wave

Multiple Choice

What type of wave is light?

• Mechanical Wave

• Electromagnetic Wave

Multiple Choice

What type of wave?

• Mechanical Wave

• Electromagnetic Wave

Transverse waves

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Longitudinal waves​

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Another way to classify waves

Wave motion is perpendicular to the direction of travel

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Transverse waves

Wave motion is in the parallel to travel

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​Longitudinal wave

Multiple Choice

What type of wave is an electromagnetic wave?

• Transverse

• Longitudinal

Multiple Choice

What type of wave is are sound waves?

• Transverse

• Longitudinal

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​Parts of a wave

The high part of a wave

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​Crest

The low part of a wave

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Trough

The distance from crest to crest in meters.

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Wavelength

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​wavelength

The height of the wave from the rest point.

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Amplitude

The bottom wave has the greatest amplitude.

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Amplitude

Multiple Choice

Which waves has the greater amplitude?

• Top waves

• Bottom waves

• The have the same amplitude

  tienen la misma amplitud

Multiple Choice

Which wave has the greater frequency?

• Top wave

• Bottom wave

Multiple Choice

Which waves has the greater frequency?

• Top waves

• Bottom waves

• The have the same frequency

  Ellas tienen la misma frecuencia

Multiple Choice

How many wave crests are shown on the graph?

• 2

• 3

• 4

Multiple Choice

What is the amplitude of this wave?

• 2 m

• 1 m

• 1.25 m

Multiple Choice

What is the wavelength of this wave?

• 2 m

• 1 m

• 1.25 m

The number of waves that pass a given point in one second.

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​Frequency

More blue waves pass the line in the same amount of time as the red waves.

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​Frequency

The blue waves have the greater frequency.

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​Frequency

Frequency is measure in hertz.

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Hertz

If wave speed stays the same, shorter waves have a greater frequency.

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Hertz

Multiple Choice

Which waves have the greater frequency?

• Top waves

• Bottom waves

• The same frequency

20 waves pass a point in 10 seconds. What is the frequency of the waves?

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Calculating Frequency

​20 waves / 10 s = 2 waves / sec

or 2 Hertz​

Multiple Choice

4 waves pass a point in 1 second. What is its frequency?

• 0.25 Hz

• 1 Hz

• 4 Hz

Multiple Choice

4 waves pass a point in 4 seconds. What is its frequency?

• 0.25 Hz

• 1 Hz

• 4 Hz