Show:
EM vs Mechanical
Wave Properties
Wave Behavior
EM Spectrum
Music
100

What type of waves can travel through a vacuum?

What is… Electromagnetic waves

100

What is a crest?

the highest part of a transverse wave

100
What is a reflection?
The bouncing back of an object or a wave when it hits a surface through which it cannot pass
100
What is loudness?
your perception of the energy of a sound
100
What is music?
a set of notes that combine in patterns that are pleasing
200

Give an example of mechanical wave and example of an electromagnetic wave.

Mechanical: Sound or the ocean wave

Electromagnetic: Sunlight or TV  

*Answers may vary

200
What is a wavelength?
the distance between crest to crest or trough to trough in a transverse wave or from compression to compression or rarefaction to rarefaction in a compressional wave.
200
What is refraction?
the bending of waves due to a change in speed
200
What is a decibel?
unit for measuring loudness
200
What is resonance?
this occurs when an object is made to vibrate at its natural frequencies by absorbing energy from a sound wave or another object vibrating at these frequencies.
300

What question(s) could you ask to compare mechanical waves vs electromagnetic waves?

  • Wave requires a medium to transfer energy?

  • Wave is only transverse?

  • Wave can travel through a medium?

*Answers may vary

300
What is frequency?
the number of complete waves that pass a given point in a certain amount of time
300
What is diffraction.
The bending of waves as they move around a barrier or pass through an opening
300
What is pitch?
a description of how high or low the sound seems to a person
300
what is fundamental frequency?
the lowest frequency produces by a vibrating object.
400
What is a medium?
The material through which a wave travels
400
What is Hertz?
the unit of measurement for frequency
400
What is constructive interference?
The interference that occurs when waves combine to make a wave with a larger amplitude
400
What is an echo?
a reflective sound wave
400
what is the eardrum?
a thin membrane that stretches across the ear canal like a drumhead.
500

Name the similarities and differences in terms these waves: 

Ocean Waves

Light from a Candle

What is…

Both are transverse waves, but ocean waves are mechanical and light waves are electromagnetic 

500
What is Amplitude?
a word used to describe that amount of energy a wave carries.
500
what is destructive interference?
this type of interference can reduce noise.
500
What is the doppler effect?
The change in frequency of a wave as its source moves in relation to an observer
500
what are hair cells?
the part of the ear that is most damaged most easily by continued exposed to loud noise