Question

what is meant by resonance in igcse physics

Answer 1

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"igcse physics" = International GCSE physics ?
A simple pendulum.
pull the bob/mass aside, and release it. The pendulum swings to and fro with a certain frequency. That frequency is called the NATURAL frequency of the pendulum. There's a formula for that which involves the square root of the length of the pendulum and g acceln of gravity. (root l/g)

Now, rather than allowing the pendulum to swing by itself, apply a force to it somehow. If the force has a frequency which matches that of the natural frequency of the pendulum, then the penudulum will MAINTAIN it's oscillations and they might even INCREASE. THAT is the RESONANCE condition.

A soprano singer and a cut crystal glass.
The glass a NATURAL FREQUENCY which is fairly high, BUT is in the AUDIBLE ACOUSTIC range. So, if a soprano singer can hit the right note purely enough, then they can force the glass to vibrate in resonance and the results can be one broken glass. Being brittle, the thing shatters as it vibrates.

There are many many many examples of resonance in physics/technology. The ones mentioned here are mechanical. Radio communications, certainly PRE DIGITAL, relied on electromagnetic resonances to TUNE into the right radio channle. It may be still true digitally, but I can't verify that.

It's all about timing. When the timing is right bridges can be under threat of being destroyed (although this seems to be a bit controversial), glasses can break, and penudula (latin plural) can oscillate "wildly".
http://perendis.webs.com
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Answer 2

thanks a lot but its still a bit confusing to me. Is there any (igsce suitable)explanation with example?

Answer 3

@IrishBoy123 portrait of a poster ? About to have a snack by the looks of it ?

Answer 4

@alfee
http://oneclass.com
Just found an email from the above ... don't quite know how it got there .... been doing a lot of button pressing recently so, almost anything could happen. But it MAY help with an "igcse" defintion of resonance, possibly through a syllabus or some such.

Answer 5

Thank you .Up to know what I could understand about resonance is:when an object A is vibrated and it makes a sound,the sound wave hits another object (B) and if the object B also vibrates and produce a sound then it is said to vibrate at its NATURAL frequency.This phenomenon is Resonance

Answer 6

Correction:up to now

Answer 7

Yes, that is possibly a neat summary of (the enormous) subject of resonance for IGCSE.
@IrishBoy123 Could you repost Edvard Munch's painting of "The Scream" somewhere ????

Answer 8

Haha @IrishBoy123 .Thanks for the help Osprey:)

Answer 9

sure mate :)

Answer 10

it's pretty timeless.

Answer 11

Lol nice one @irishboy123

Answer 12

@IrishBoy123 thanks for that picture, shamrock, but it's not the one I actually meant ! I thought you posted the "original" some time ago. That one shows a "distressed easter egg" ???? The orig is one of my favourite "expressionist" paintings and sort seems to fit in with the current situation re "here", shall we say.

Answer 13

Haha

Answer 14

"distressed easter egg" ?!?!

"distressed easter egg" ?!?!

Answer 15

@osprey

i think this is the type of polemic you mean :)

Answer 16

@IrishBoy123 now there's a word that I've never understood the meaning of "polemic".
If someone has sold the "client list", which I guess includes me, then is it a case of closed today, open again tomorrow ?
Herr Munch was none too happy, but then neither were Mr Thomas Hardy, nor Tchaikovsky by all accounts ...