WavesPPT

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Category: Education

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Powerpoint Podcast for VTSCIED

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Waves:

Waves

What do all these have in common?:

What do all these have in common? They are all WAVES!

The Nature of Waves:

The Nature of Waves A wave is a repeating disturbance that transfers energy Waves... Are created by vibrations Carry energy, but not matter Me dium- the material a wave travels through Can be solid, liquid, or gas

Two Types of Waves:

Two Types of Waves Electromagnetic Waves: do not need a medium to travel Example: Light Waves Mechanical waves: MUST have a medium Example: Sound Waves

Electromagnetic Waves (More specifically- Light):

Electromagnetic Waves (More specifically- Light)

Mechanical Waves (More specifically Sound):

6 Mechanical Waves (More specifically Sound) 6

Shapes of Waves:

Shapes of Waves Transverse waves – matter moves up and down at right angles to the motion of the wave Example: water waves

Shapes of Waves:

Shapes of Waves Compressional waves – matter moves back and forth in the same direction that the wave travels. Example: Sound waves

Compressional vs. Transverse:

Compressional vs. Transverse 9

Shapes of Waves:

Shapes of Waves Transverse waves have crests (the highest points), and troughs (the lowest points)

Shapes of Waves:

11 Shapes of Waves Compressional waves have dense regions called compressions and less dense regions called rarefactions

Parts of Waves:

Parts of Waves Waves differ by... How much energy they carry shown by amplitude How fast they travel equal to frequency times wavelength

Parts of a Wave:

Parts of a Wave Amplitude – a measure of the energy in a wave measured from the mid-line to the crest The more energy, the greater the amplitude

Wave Properties:

Wave Properties Amplitude of compressional can be seen in how tightly packed the matter in the compressions is More dense compressions = more energy

Parts of a Wave:

Parts of a Wave Wavelength – the distance from crest to crest or trough to trough Measured in meters Frequency – how many wavelengths pass each second expressed in hertz (Hz)