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What's the difference between electrical resonance and sound resonance?

 
 
Joel1
 
Reply Tue 18 Dec, 2018 06:11 pm
What's the difference between electrical resonance and sound resonance (like breaking a wine glass with sound)? Are there any other types of resonance?
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Type: Question • Score: 0 • Views: 273 • Replies: 2
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fresco
 
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Reply Wed 19 Dec, 2018 02:13 am
@Joel1,
When rigid objects , like glasses, are struck, they vibrate at particular frequencies according to their structure. If sound waves of the same frequency as their own hit those objects, they vibrate 'in sympathy' with the sound. This is resonance.
Electrical circuits can be 'tuned' to radio waves' which are electro magnetic vibrations in a particular frequency range. This is because their circuits contain components called inductances and capacitors which can be altered to keep exchanging magnetic and electrical effects between them like a swinging pendulem.
Electromagnetic waves include 'light' (which resonates components in our eyes) and infra red (which we feel as heat when it resonates our skin sensors)
Microwave cookers resonates water molecules in food such that vibrations heat the food which contains them.
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fresco
 
  1  
Reply Wed 19 Dec, 2018 02:38 am
@Joel1,
(NB I should have added that the tuning of electrical circuits results in oscillations of current direction. Radio waves can 'carry' sound waves by for example allowing the sound waves t0 affect the amplitude 0f the radio waves. This is called AM ...amplitude modulation)
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