yelp!!!!!!!!!

- YumYum247

yelp!!!!!!!!!

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- jamiebookeater

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- YumYum247

@dan815 could you plz give me a quick tuition on this topic, i'm really struggling here :(

- YumYum247

@abb0t can you please help me????

- YumYum247

ok i need to learn from the ABC for the concept!!!

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## More answers

- YumYum247

ok so i know that when two waves interfere with each other they produce either, constructive waves if the waves are over the equilibrim or destructive waves if under the equilibrium.

- nincompoop

partial too

- YumYum247

the only thing i'm struggling to understand is that fact that how do i know what shape the two waves will produce when collide with each other....like how do i do my calculations??

- nincompoop

depending how the waves interacted and waves can vary in energy too

- YumYum247

there is no concept of energy here, just the types of collisions and what shape it'll produce and in what direction!!!

- nincompoop

but not all waves are the same nor collide in two manners only

- YumYum247

but what is for sure is that fact that there are only two options given to me so therefore all the questions are related to either constructive or destructive waves.....btw how do i calculate the resultant displacement of the two waves...

- YumYum247

could you please do a quick drawing of at least one of the examples?!?!!??!

- YumYum247

any idea????????????????

- YumYum247

@peachpi please help me

- anonymous

I know this is generally more complex, but do they maybe just want you to add/subtract here?

- anonymous

http://www.physicsclassroom.com/class/waves/Lesson-3/Interference-of-Waves
superposition drawing near bottom

- YumYum247

yes but since these are "shapes", i'm struggling to understand how do i calculate the resultant displacement. i know the first one is construction and the second one is neither construction or destruction, i'll be a wave since crest and trough cancel out each other.

- dan815

do you still need help?

- YumYum247

yus please!!

- dan815

is it that same picture up at the top

- YumYum247

yes the picture at the top is the qestion, how do i calculate the resultant displacement in figure 1.

- YumYum247

i know when two waves interact with each other, the form a superposition where the crest of both waves are combined but how do i put that into a mathematical form?!?!?!?!

- dan815

okay now linear Superposition principle can be summarized byt this equation f(x+y)=f(x)+f(y) we say such an equation follows the principle of Lin sup pos

- YumYum247

can you please just do one question in drawing?!?!?!!? i'll do the rest.

- dan815

um okay so its not exactly the crests that are combines its all the heights everywhere

- YumYum247

interesting please go on!!!

- dan815

|dw:1436150952876:dw|

- YumYum247

in this case it'll be zero since A = highest - lowest /2

- dan815

|dw:1436151013791:dw|

- YumYum247

how tho?????? :O

- dan815

okay what we do is look at every x values and add the 2 heights there

- YumYum247

ok so do we come up with our own numbers here to calculate eveything

- dan815

|dw:1436151217242:dw|

- YumYum247

i thought crest would cancel out trough and the remaining (rectangle) would continue to move in the right direction.

- dan815

brb

- dan815

ok back

- YumYum247

Awwwnnnn!!!! |dw:1436162165903:dw|

- dan815

how come yours is different from the picture

- YumYum247

ok assume that the rectangle is touching the sin wave...sorry my bad.

- dan815

|dw:1436151592824:dw|

- dan815

we add 1 to everywhere on that wave

- YumYum247

ok so to do my calculations, do i just make up my own numbers, i mean height

- dan815

ill draw on the pic

- YumYum247

ok please slow down for a sec.

- dan815

http://prntscr.com/7pad48

- YumYum247

please answer my questions before you proceed with the qestion.....i want to clearfy everything first.

- dan815

ok what

- YumYum247

so to do all the calclations, do i make up my own numbers, i mean when i draw those diagrams on the graph, to calculate the dispalcement???

- dan815

well they gave u only pictures so answer with a picture

- YumYum247

and please tell me the main rule/ recipe

- YumYum247

but the picture is not on scale.

- dan815

so

- YumYum247

ok so that means we don't need to draw it on the graph paper????

- dan815

i dont know

- YumYum247

can you solce without the need of graph paper????

- YumYum247

solve

- dan815

okay main thing is
the form is this
f(x)= k + k*sin(x)

- YumYum247

ok

- dan815

you are adding to like a sin(x) looking wave

- dan815

its not really a sine wave, just making that up

- YumYum247

ok so how do we utilize the equation to find the displaceent

- YumYum247

@dan815 ok so i add 1 and then what?

- dan815

hi

- YumYum247

hi :)

- dan815

lol

- dan815

lets start over

- YumYum247

please!!!

- YumYum247

:)

- dan815

|dw:1436152421672:dw|

- YumYum247

ok.

- dan815

|dw:1436152449162:dw|

- YumYum247

ok i see.

- dan815

|dw:1436152521293:dw|

- YumYum247

but how do you know how high is that???? since there are no numbers given

- dan815

we dont

- YumYum247

ok cool....next!!!

- YumYum247

ok so you brought everything on the positive side of the equilibrium....nice!!

- YumYum247

by adding 1

- dan815

there are no numbers

- YumYum247

ok i see.

- YumYum247

ok what's next.

- dan815

u tell me

- YumYum247

honestly if i knew i'dn't be here. but give me some time to take a guess!!!

- YumYum247

you add crest of both waves!!!

- dan815

the question is done

- YumYum247

but the question asks me to "determine the resultant wave" so what do i say?!?!?!?

- dan815

|dw:1436152891797:dw|

- YumYum247

btw how would the final wave look like if we're to actually draw the resultant wave!!

- YumYum247

what happened to the green magenta rectangle, weren't you suppose to add that height as well.

- YumYum247

because the rule says, when two waves collide, they make constructive wave!!!

- dan815

|dw:1436153051159:dw|

- YumYum247

OMG i kinda understood what you did there.....!!!

- YumYum247

ok i got it......!!!

- YumYum247

ok so what would happen to the first one?!???!

- YumYum247

since both are on the positive side of the equilibrium......do you just stack the inner box on the outer box?!?!?!?! yes i think SO

- YumYum247

@dan815 please check if i did that right?!?!?!?

- dan815

ill give u a problem do it to the best of your ability

- YumYum247

so for the first question do you just stack the inner black box on top of the dotted box?!?!?!

- dan815

|dw:1436153397371:dw|

- dan815

what is the result of these 2?

- YumYum247

wait is that a V or a triangle?!?!?!?

- dan815

okay try another one

- dan815

|dw:1436153559275:dw|

- dan815

|dw:1436153620648:dw|

- dan815

|dw:1436153640721:dw|

- YumYum247

hold on damn it... let me think :"D LOL

- YumYum247

ok so for this, you add 1 to the "U" thing to create a constructive wave, so i'll be on top of that weird figure.|dw:1436164542171:dw|

- YumYum247

|dw:1436164670586:dw|
you add 1

- YumYum247

|dw:1436164695260:dw|you add 1 LOL

- YumYum247

|dw:1436164718280:dw|you add 1

- YumYum247

@dan815 All done!!!! :"D

- YumYum247

can't believe i spent an entire day on this silly concept!!! Thanks you and Love you to death for helping me out. GOD BLESS YOU.

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