Notes

Electromagnetic Spectrum Diagram



Electromagnetic Spectrum Foldable 



Transverse Waves = Light Waves (do NOT need matter to travel through)
Longitudinal Waves = Sound Waves (need matter to travel through)

Fun Fact
#1.) Lightning and thunder happen at the same time. But you see lightning before you hear thunder because light, which travels a million times faster than sound, arrives almost instantly. Sound, on the other hand, takes about five seconds to travel one mile. You can measure how far away lightning is by counting the number of seconds between seeing the flash and hearing the thunder. For example, if you count ten seconds between the lightning and the thunder, the lightning is about 2 miles away. 

#2.) When you speak, the sound of your voice is produced by membranes in your larynx or “voice box.”  These membranes are called vocal cords and they vibrate as air is forced across them.  The sounds are varied by varying the thickness of these membranes.  Sound familiar?

When others hear you speak, they hear sounds that are created only by the vocal cords. However, as you speak, these vocal cords cause the bones in your head to vibrate as well, and the sound of your voice as heard by you is a combination of the vocal cords vibrating the air and vibrating the bones in your head.  When you heard your voice on a tape recorder, the sound that was recorded is very similar to what others hear when you speak, because it records the part of the sound of your voice produced only by your vocal cords vibrating the air.  When this was played back, you heard your voice as others do - without the vibrating bones - and it probably sounded a little unfamiliar.  For the same reason, your friend probably didn’t recognize his or her voice on tape either.



Characteristics of Waves Foldable

SelectionFile type iconFile nameDescriptionSizeRevisionTimeUser
ĉ
View Download
  29k v. 1 Dec 11, 2014, 5:44 AM Amy Leahy