Mechanické vlnění
2. Mechanické vlnění
2.1 Vznik a druhy vlnění
2.2 Rovnice postupného vlnění
2.3 Interference vlnění
2.4 Odraz a lom vlnění
2.5 Ohyb vlnění
Vlnění
- Jeden z nejrozšířenějších fyzikálních jevů
- Více druhů vlnění – liší se různou fyzikální podstatou
- Příklady: mechanické, elektromagnetické vlny (radiové, mikrovlny, světlo, rentgen, UV, IR záření)
2. Mechanické vlnění
- Př. Vodní hladina
- Vlnění se šíří všemi směry
- Při mechanickém vlnění nedochází k přenosu látky, ale pouze energie
- Podstatou mechanického vlnění je přenos kmitání látkovým prostředím
2.1 Vznik a druhy vlnění
- Vlnění vzniká v látkách všech skupenství
- Příčinou je existence vazeb mezi částicemi prostředí ® kmitání se vazbou přenáší na další částice a současně se přenáší energie kmitavého pohybu
Vlnová délka
- l[m]
- Vzdálenost, do které se dostane vlnění během jednoho kmitu (1 perioda)
- l = v.T = v/f
Rychlost mechanického vlnění
- Závisí na prostředí, ve kterém se šíří
- Nejrychleji se šíří v pevné látce ® těsnější vazby mezi částicemi
Druhy vlnění
1) Postupné vlnění
a) Příčné
- Body kmitají kolmo na směr vlnění
- Lano
b) Podélné
- Částice kmitají ve směru vlnění
- Zřeďování a zhušťování částic
- ……………………………………..
2) Stojaté vlnění
- Vzniká skládáním kmitů
2.2 Rovnice postupného vlnění
- Vztah, který umožňuje určit okamžitou výchylku v každém bodě řady, kterou se vlnění šíří
- Tato výchylka závisí na čase a na vzdálenosti od zdroje vlnění
- Okamžitá výchylka je pouze funkcí času
- y = ym.sinwt
- y = ym.sin2p(t/T – x/l) ® 2p(t/T – x/l) = fáze vlnění
- touto rovnicí můžeme popisovat příčné i podélné vlnění
Komentáře
Přehled komentářů
Why visitors still make use of to read news papers when in this technological globe all is accessible on web? öka fettförbränning tabletter esep.prizsewoman.com/map13.php
snö of sweden återförsäljare stockholm
(snö of sweden återförsäljare stockholm, 23. 8. 2021 13:29)
Thank you for the good writeup. It actually was once a leisure account it. Glance complicated to far brought agreeable from you! However, how can we be in contact? snö of sweden återförsäljare stockholm staru.prizsewoman.com/map14.php
decleor aromessence neroli
(decleor aromessence neroli, 23. 8. 2021 4:38)
I have learn some just right stuff here. Definitely price bookmarking for revisiting. I surprise how much attempt you place to make the sort of great informative site. decleor aromessence neroli tirwo.teswomango.com/map21.php
telia bredband vilken hastighet kan jag få
(telia bredband vilken hastighet kan jag få, 22. 8. 2021 20:09)
I could not resist commenting. Exceptionally well written! telia bredband vilken hastighet kan jag få nasta.teswomango.com/map1.php
tabletter mot eksem
(tabletter mot eksem, 22. 8. 2021 10:58)
I think that what you published made a lot of sense. But, think on this, what if you were to write a killer post title? I am not suggesting your content isn't good, but what if you added something to possibly grab people's attention? I mean is a little boring. You ought to peek at Yahoo's home page and watch how they create article headlines to get viewers interested. You might try adding a video or a pic or two to grab readers interested about everything've got to say. In my opinion, it would make your posts a little livelier. tabletter mot eksem pieso.sewomabest.com/map25.php
färga fransar hemma
(färga fransar hemma, 22. 8. 2021 2:34)
You actually make it seem so easy with your presentation but I find this matter to be really something that I think I would never understand. It seems too complex and very broad for me. I am looking forward for your next post, I will try to get the hang of it! färga fransar hemma tisi.teswomango.com/map14.php
färga ögonbryn kille
(färga ögonbryn kille, 21. 8. 2021 18:03)
Nice blog here! Also your website loads up very fast! What host are you using? Can I get your affiliate link to your host? I wish my site loaded up as fast as yours lol färga ögonbryn kille sorbbe.prizsewoman.com/map16.php
kitchenaid diamond blender prisjakt
(kitchenaid diamond blender prisjakt, 21. 8. 2021 9:40)
Hi friends, how is everything, and what you wish for to say on the topic of this piece of writing, in my view its actually awesome in support of me. kitchenaid diamond blender prisjakt genso.teswomango.com/map2.php
molo rainbow vinterjacka
(molo rainbow vinterjacka, 21. 8. 2021 1:29)
Very nice post. I just stumbled upon your blog and wished to say that I have truly enjoyed browsing your blog posts. After all I'll be subscribing to your feed and I hope you write again soon! molo rainbow vinterjacka tumbt.teswomango.com/map3.php
chevrolet delar sverige
(chevrolet delar sverige, 20. 8. 2021 16:14)
This design is incredible! You obviously know how to keep a reader entertained. Between your wit and your videos, I was almost moved to start my own blog (well, almost...HaHa!) Great job. I really loved what you had to say, and more than that, how you presented it. Too cool! chevrolet delar sverige neudi.teswomango.com/map4.php
aluminiumform i ugn
(aluminiumform i ugn, 20. 8. 2021 8:21)
Its like you read my mind! You appear to know a lot about this, like you wrote the book in it or something. I think that you can do with a few pics to drive the message home a bit, but other than that, this is excellent blog. A great read. I'll definitely be back. aluminiumform i ugn spinte.prizsewoman.com/map5.php
bikini med string
(bikini med string, 20. 8. 2021 0:43)
It's very simple to find out any topic on net as compared to books, as I found this article at this site. bikini med string olet.teswomango.com/map19.php
Gay blog
(RobertCar, 17. 8. 2021 9:46)
https://www.google.com/url?q=https://bear-magazine.com/gay-sauna-geschichte/
https://cse.google.mu/url?q=https://bear-magazine.com/berlin-gay-hostel/
https://sandbox.google.com/url?q=https://bear-magazine.com/dating-a-brazilian-gay-man/
https://images.google.be/url?q=https://bear-magazine.com/gay-nazi/
https://sandbox.google.com/url?q=https://bear-magazine.com/berlin-gay-hostel/
https://sandbox.google.com/url?q=https://bear-magazine.com/gay-action-books/
https://plus.google.com/url?q=https://bear-magazine.com/blowjob-gay-teen/
https://plus.google.com/url?q=https://bear-magazine.com/gay-mormon-porn/
https://maps.google.com.pr/url?q=https://bear-magazine.com/gay-royal/
https://sandbox.google.com/url?q=https://bear-magazine.com/gay-club-nice/
handla konst på nätet
(handla konst på nätet, 13. 8. 2021 22:50)
Howdy! This is kind of off topic but I need some advice from an established blog. Is it hard to set up your own blog? I'm not very techincal but I can figure things out pretty quick. I'm thinking about creating my own but I'm not sure where to start. Do you have any points or suggestions? With thanks handla konst på nätet sepec.prizsewoman.com/map7.php
billiga underställ ull
(billiga underställ ull, 13. 8. 2021 13:47)
Howdy would you mind letting me know which hosting company you're working with? I've loaded your blog in 3 different browsers and I must say this blog loads a lot faster then most. Can you suggest a good web hosting provider at a honest price? Thanks, I appreciate it! billiga underställ ull wangha.teswomango.com/map20.php
svart och vit inredning
(svart och vit inredning, 13. 8. 2021 5:47)
It's the best time to make some plans for the future and it's time to be happy. I have read this post and if I may I wish to counsel you some fascinating things or tips. Maybe you can write next articles referring to this article. I wish to read even more issues about it! svart och vit inredning flypos.sewomabest.com/map2.php
schampo torrt hår test
(schampo torrt hår test, 12. 8. 2021 22:00)
You're so awesome! I do not believe I've read through a single thing like this before. So good to discover another person with original thoughts on this issue. Seriously.. thank you for starting this up. This site is one thing that is required on the internet, someone with some originality! schampo torrt hår test inis.teswomango.com/map17.php
tyger online retro
(tyger online retro, 12. 8. 2021 13:03)
WOW just what I was looking for. Came here by searching for
Greate pieces. Keep writing such kind of info on your site. Im really impressed by your blog.
Hi there, You have done an incredible job. I will definitely digg it and in my view recommend to my friends. I'm confident they'll be benefited from this website. tyger online retro nighl.sewomabest.com/map13.php
högt kalium njursvikt
(högt kalium njursvikt, 12. 8. 2021 5:08)
Hi there this is somewhat of off topic but I was wondering if blogs use WYSIWYG editors or if you have to manually code with HTML. I'm starting a blog soon but have no coding expertise so I wanted to get advice from someone with experience. Any help would be enormously appreciated! högt kalium njursvikt skewol.teswomango.com/map19.php
skor center syd
(skor center syd, 11. 8. 2021 21:02)
Currently it seems like Wordpress is the best blogging platform available right now. (from what I've read) Is that what you're using on your blog? skor center syd deista.teswomango.com/map24.php
1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | 27 | 28 | 29 | 30 | 31 | 32 | 33 | 34 | 35 | 36 | 37 | 38 | 39 | 40 | 41 | 42 | 43 | 44 | 45 | 46 | 47 | 48 | 49
öka fettförbränning tabletter
(öka fettförbränning tabletter, 23. 8. 2021 22:31)