First of all, I am very sorry I just started the blog right now. I just came home from a dance rehersal, I apologize. (: But hey! I'm still in front of my pc doing this awesome blog of mine!
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Today in class we basically went over the study guide given to us on last friday.
It mostly covered the properties of the waves and the wave interferences.
What I will be doing is picking out certain parts under every subtopic that I believe is the most important out of the whole study guide.
WAVE PROPERTIES
Types Of Waves:
Mechanical waves: require a material medium (basically means it is not capable of transmitting
energy through a vacuum/empty space)
: examples - water waves and sound waves
: 3 kinds of mechanical waves - transverse, longitudinal, and surface waves.
electromagnetic waves: requires no medium
: examples - light waves and radio waves
: produced by the vibrations of charged particles
: produced by the vibrations of charged particles
**refer to past posts by past scribes for further detail on transver, longitudinal and surface waves. **
Refresher on measures of a wave:
frequency: number of complete vibrations per second measured at a fixed location (hertz)
period: shortest time interval in which the motion repeats itself
wavelength: shortest distance between points where the wave pattern repeats itself (lambda)
Amplitude Of a Wave:
- it takes more work to produce a wave with a large amplitude than it does to produce a wave with a small amplitude.
therefore: the larger the amplitude, the more energy is transferred.
WAVE INTERFERENCE:
Waves at Boundaries Between Media:
(media is plural for medium)
this subtopic basically covers what happens to waves when we have more than one medium.
**the speed of a mechanical wave does not depend on the amplitude or the frequency of the wave**
Mrs. Kozoriz said that this is a very important thing we need to know so get it stuck in your head!
**the speed of a mechanical wave does not depend on the amplitude or the frequency of the wave**
Got it yet? Let's just have it one more time.
**the speed of a mechanical wave does NOT depend on the amplitude or the frequency of the wave**
Having that said, the speed of a mechanical wave only depends on the properties of the medium.
incident wave: the wave that reaches the bounday between one medium and another.
transmitted wave: the wave that moves through the new medium
reflected wave: the partial wave of the incident wave that moves backward from the boundary
**when a wave passes from a less dense to a more dense medium, the reflected wave is inverted. **
** when a wave passes from a more dense to a less dense medium, the reflected wave is erect, or on the same side.
** when a wave passes from a more dense to a less dense medium, the reflected wave is erect, or on the same side.
!CONSIDER THE FOLLOWING!
When a wave is trasnmitted from one medium to another, the frequency of the wave does not change, however the wavelengthe and the speed of the wave changes.
Superposition of Waves:
PRINCIPLE OF SUPERPOSITION: the displacement of a medium caused by two or more waves is the algebraic sum of the displacements caused by the individual waves.
*interference is the result of the suporposition of two or more waves*
*constructive interference occurs when the wave displacements are in the smae direction.
*destructive interference occuse when the wave displacements are in opposite directions.
Standing Waves:
Node - area that is undisturbed (moves the littlest)
antinode - area with maximum displacement
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I think that this is a very interesting topic actually. It's my first time to ever study Physics and I'm actually quite interested in this topic. I just find that it has a looot of information you really need to know, like the parts of the waves, what everything does and how it affects other things. Once you really get to understand everything we cover in class, I think the test will be a alright for us all.!
So that's the end of all of this Physics talk.
AAANNNNDDD! not to forget that we have a very lovely Physics Test dedicated to Waves in One Dimension on Thursday, September 18 2008. So study study study!
The scribe for tomorrow will be CAMY TRAN! (caaamy)
ciiiiiaaaaaoo!!
-yvanne gelli dandan (:
7 comments:
WOOW, that was a good post. Hahah, well to be honest I just skimmed, but it looked good. I'm probably going to refer to this tomorrow though, for studying purposes.
I wasn't going to comment, but then I saw your diagram thing, and I'm like, 'cool!', so yeah, just thought I'd share. xD
WOW THATS SO COOL!!!! ya i pulled a nelsa :P but wow that looks frekin schweet!!!! wow ya im studyin off this for tmmrw lol awsoem job!!!!
alrite i read over ur post now and i got it **the speed of a mechanical wave does NOT depend on the amplitude or the frequency of the wave**!!!!!!!!!! and u copyed bill nye the science guy!!! *cue theme song* hahah and nice job of the word littlest :P GREAT POST!!!!!!!!!!
Wooaahh Dion! I see it! The Bill Nye influenced text! *gasp* Hahahah.
We're such dorks, commenting more than once.
lol these are one of those instances where #1 would congratulate #2 on making something so great that it made #1's previous work look like garbage ahah, so AWESOME POST!!
great post Yvanne! it looks like you put lots of work into it!
and just cus im a reely big nerd im lve one more comment :O nelsa where are u!!!!!!!! hahah great job :)
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