Wave Interference

109 - Wave Interference
In this video Paul Andersen explains how waves interact with objects and with other waves. When a wave hits a fixed object it will be reflected and inverted. When a wave hits a free object it will be reflected without being inverted. Waves pass through other waves but can show either constructive or destructive interference. Traveling waves confined to a boundary will creating standing waves through interference.
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Music Attribution
Title: String Theory
Artist: Herman Jolly
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All of the images are licensed under creative commons and public domain licensing:
Kuiper, Pieter. English: Reflection of a Single Pulse on a String at a Fixed End and at a Free End. The Red Line Is Used for Constructing an “Image Wave”. Superposition with a Pulse of Opposite Sign Keeps the Endpoint Fixed., January 22, 2010. Own work. commons.wikimedia.org/wiki/Fil....
Martin-rnr, Tanrek jpg: Thierry CaroBig-eared-townsend-fledermaus jpg: US GovernmentBottlenose_dolphin_mother_and_juvenile jpg: US GovernmentAerodramusMaximus Wokoti jpg: wokotiderivative work: Echolocating Animals. Clockwise Starting with the Dolphin: Tursiops Truncatus, Tenrec Ecaudatus, Aerodramus Maximus, Corynorhinus Townsendii., May 21, 2011. Tanrek.jpg Big-eared-townsend-fledermaus.jpg Bottlenose_dolphin_mother_and_juvenile.jpg AerodramusMaximus.Wokoti.jpg. commons.wikimedia.org/wiki/Fil....
“Superposition Principle.” Wikipedia, the Free Encyclopedia, April 1, 2015. en.wikipedia.org/w/index.php?t....
Svensson, Håkan. English: Gustaf Vasakyrkan. Organ., July 7, 2003. Own work: No correction has been done to the picture. commons.wikimedia.org/wiki/Fil....
“Wave on a String.” PhET. Accessed April 16, 2015. phet.colorado.edu/en/simulati....

[@kl6902]

I have scoured CZcams for hours trying to find this exact explanation to understand how resonance works, I couldn’t understand why and how the waves would return. This was explained in a way that I could easily understand and now it all makes sense! I’ve never taken physics in my life, I just wanted to understand the concept. Waves are super cool!

[@danielc.m6899]

Your videos are life savers. Thank you Mr Anderson!

[@garrettwilkes8619]

Daniel.C.M slick

[@upandatom]

the slinky thing was so good

[@kaisonsz]

The use of the flow chart is super helpful and organized. It really puts everything into perspective. Thanks Mr. Anderson!

[@melontusk7358]

Should really have watched this in high school. Now I'm in college studying optics. It took me years to figure out how standing waves work. This video explained it to me clearly in minutes. Thanks a lot, Mr. Anderson.

[@rosey6851]

Thank you so much!! Your videos are amazing and so helpful. I can't imagine where I would be w/ my science studies without you, Mr Anderson!!!!
Thank you so much again! Keep up the great videos :)))))))

[@mariajosenerio738]

was so clear! when the waves subtract and add, also the free end and the fixed end.

[@shekinahcanos43]

Your explanation makes physics appear to be simple. Thank you so much sir!

[@perceptionshare2248]

Great video. Thank you for sharing your perception.

[@mahdiomidvar564]

you are my professor and i am always thankful to you

[@maheshjayawardena6273]

Very clearly explained.thank you so much!!

[@sairaasghar7029]

Thanks Mr Anderson

[@A-lumy]

thank- you MR Andersen.

[@garrettwilkes8619]

alex zeilo yw!

[@israsharif5647]

Thank you so much! It helped a lot.

[@Qist13]

Very well explained!

[@waqarali-mi1ph]

Mannnn. Soo good
Brief and effective.

[@dylanriffel6013]

Thank you so much in this clarification and eloquent explanation of waves.

[@xolox_king_xolox6009]

It’s 5:00 in the morning and I’m studying for my exam . After 3 hours my exam will start wish me luck 👍🏼👍🏼

[@hypnodisckit7015]

How did the exam go

[@zengenite7643]

@Henson Brown It's so funny that someone failed their exam right

[@Lisa-mp2lw]

Thankyou so much. This was so helpful ❤️

[@user-hf2wy1wo2e]

Very cool mr Anderson

[@moirangthemsanahal6695]

Perfect sir. That was of course helpful

[@kanyanerevival9455]

Thank you so much, best video ever!!!

[@nikoo139]

thanks this helped a lot with my sci homework

[@atm0910]

It's so beautiful！！

[@usmanafridix]

i love this man i can do anything for him

[@Hajjmusic_]

This is very cool

[@aathmikagovindh7639]

thank you I understood tat very clearly

[@suadali1017]

Thank you .

[@Remarkable269]

So helpful 🤝

[@dinushkaheshan8239]

Thank you...📯

[@deepakjhajhra5245]

Nice bro .... Thanks

[@misamumadiumba5001]

Thanks Soo much

[@gianettie5015]

Yay, thank you.

[@hazharblbas5326]

جزاك الله خير 😊

[@39-s]

بحق الجحيم

[@fatmanurustun91]

Thank u so much.U saved my life. I understood with u

[@garrettwilkes8619]

Fatma Nur Üstün hmu

[@geofreymhomela1618]

Nice video

[@same984]

what grade do you teach

[@silassmith3339]

thanks man

[@moazelsawaf2000]

Thanks sir

[@SarveshKumar-ml5jd]

it was osm video......
u deserve 10000000000 likes

[@M4RKSMN]

Mr. Anderson what camera do you use? It seems to have a lot of features!

[@garrettwilkes8619]

Deadshot 08 YT nykon pro 1150

[@funfact771]

How it is destructive I saw in the animation that they bounce back so it is not actually nullifing the effect

[@lakshmamanv7936]

thanks sir

[@Mulcman124]

Hey +BozemanScience what kind of mic do you use?

[@Bozemanscience1]

Mulcman124 I use a Samson USB Go Mic

[@Mulcman124]

+BozemanScience Thank You!

[@VK-il9kv]

thanks mate

[@bhumikanaik8150]

Nice

[@user-qx5cn1si1q]

Can someone please help me? Why does anti reflection coating of lenses have to be a quarter of the wavelength of light, if both of the reflected waves (from the first surface and the second surface) will undergo 180 degree phase change? Won't they interfere constructively in any way, despite the thickness of the coating, since the reflected rays will be exactly the same as the incident wave, except they BOTH will be 'flipped upside down', having the same phase (no phase change between the two reflected waves)? Both of the reflected waves should undergo 180 degree phase change and therefore, interfere constructively.

[@kirazhang6170]

OMG u saved my life

[@maeg1458]

Why do you explain it better than my teacher?

[@tvrtkoticinovic]

nice

[@matthew_bang]

Who would dislike this video??

[@zaidpansare4895]

Thank Unacademy for increasing your views!!!

[@rojeen6861]

i LOVE U

[@viayork6860]

🙌🏽🙌🏽

[@VZOUTTAHERE]

[@mukulgupta4806]

cAN ANYONE EXPLAIN WHY DOES THE WAVE GETS INVERTED WEN IT HITS A FIXED END ??

[@aathmikagovindh7639]

I have the same doubt mukul

[@divyar8402]

the fixed end is fixed . when the last particle of the slinky exerts an upward fore on the first particle of the fixed rod its unable to move it , but there's the Newtons third law of motion that exerts a reaction force in the opposite direction to that of the force exerted by the last particle of the slinky hence now the slinky has an inverted pulse

[@hasaniqbal233]

it tries to go up but it cant cause its fixed, so it gets jerked downwards instead

[@garrettwilkes8619]

Due to the fixed ratio point on the inverted time fraction zone...

[@randymaze5047]

perfect response

[@michiganpark262]

Its Mister Weeks

[@marcgeurts3606]

First

[@yousefal-jazzazi1308]

F

[@katelywilliams5325]

I’m so confused