unde_mecanice.ppt
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Transcript of unde_mecanice.ppt
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Reflexie RefracieDifracie InterferenUnde staionare
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Fenomenul de ntoarcere a undei n mediul din care provine atunci cnd ntlnete suprafaa de separare a dou medii.
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Raza incident , normala n punctul de inciden si raza reflectat sunt coplanareUnghiul de inciden este egal cu unghiu de refracie
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Undele trec dintr-un mediu n altul modificndu-si direcia i lungimea de und sin i / sin r = v1 / v2 = 1 / 2
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Ocolirea aparent a obstacolelor sau deschiderilor atunci cnd dimensiunea acestora e comparabil cu lungimea de und a undei.
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Interferen constructiv
Interferen distructiv
Amplitudini diferite
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unda trasmis are vitez i lungime de und mai mic dect cea incident . unda reflectat are aceeasi vitez i lungime de und ca si unda incident dar faz diferit .
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unda trasmis are vitez i lungime de und mai mare dect cea incident unda reflectat are aceeasi vitez i lungime de und ca si unda incident dar faz diferit
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http://electron9.phys.utk.edu/phys135d/modules/m10/waves.htmhttp://www.physicsclassroom.com/Class/waves/http://www.civeng.carleton.ca/Exhibits/Tacoma_Narrows/DSmith/photos.html
http://www.phy.ntnu.edu.tw/ntnujava/http://physics-animations.com/Physics/English/int_txt.htmhttp://www.physics.uc.edu/~sitko/CollegePhysicsIII/24-WaveOptics/WaveOptics.htmhttp://www.physicalgeography.net/fundamentals/10ac_2.htmlhttp://sites.google.com/site/bromfieldphysics/waveshttp://standards.nctm.org/document/eexamples/chap7/7.4/index.htm#applet
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