Wavelength of Light Released from Hydrogen

What wavelength of light is released when an electron drops from n=4 to n=2 in hydrogen? All you need is a formula and the Rydberg constant (and a calculator...)
Check me out: www.chemistnate.com

[@RickyRiceB]

7 years later and this man’s still saving lives with this video!!! You actually made it understandable ;-;

[@thecolorteale]

I have wasted so much time trying to figure out how you get the actual real wavelength from the Rydberg equation when all I needed to do was watch this video. Everyone else on the planet, textbook included, just completely skips that part and expects you to be some sort of wizard and figure that out...except you. THANK YOU!!!

[@parpar7878]

Everybody commenting that n1 should be smaller than n2 .....Explanation: In math you can subtract final - initial or initial - final and get the same numeric value but with different signs, Example (10-5)(5)=25 and (5-10)(5)=-25
Since math is using a number line for negatives, its not the same thing as energy lost and gained. THERE IS NO SUCH THING AS NEGATIVE ENERGY NOR NEGATIVE WAVELENGTH therefore he can just flip the sign at the end and make it positive when hes done (the change between the two is the same). This way his equation shows how there was a actual change from a higher energy level to a lower energy level. Just take the negative away. I hope this helps.

[@HassanAhmed-ox4ee]

actually you have to put n1= 2 and n2=4 then you get positive value......as wavelenth is inverse of wave number so we flip te value and divide by 1.......

[@rania5088]

Best explanation, thank you ❤️

[@BOLYANA]

That’s what I was looking for, thanks 🤝🏻🤝🏻

[@lindsayryder6919]

Thank you for including each step. This is the only video I found that showed them without skipping something. THANK YOU!!

[@LeighAlbert]

You Sir, are a lifesaver! I have struggled with this equation for the past two days. Thank you

[@angela1madrid]

Your explanation was awesome except for the negative part of the equation. You should never get a negative number because n1 should always be smaller than n2. The answer I calculated was 481.2737. The color of this wavelength is bluish green. Good video, but you should correct that mistake.

[@angela1madrid]

angela1madrid Sorry I meant the answer is 486.2737

[@mrbroken1641]

@@angela1madrid right

[@blomvonar]

I know you made these forever ago, but your videos are extremely helpful in my gen chem college course, so thank you very much

[@Fabian-en8xs]

college!?!?!? They're trying to teach us this in high school :(

[@rollswetlogs]

Just wanted to comment and say I was having trouble applying the equation to my assignments. Your video was straight forward and enabled me to find the correct answer. So thanks. I will make a point to check your channel first if I need anymore references for my course work.

[@leorabettan7148]

For anyone studying, the equation is NOT initial - final, it's final - initial

[@midnightly1195]

The first thing I noticed. Thought I was crazy lol

[@konulalizada5902]

Thank you, thank you and thank you! Your lessons are so easy to understand. Please keep posting more videos :)

[@youngsandwich133]

life saver! thank you! plz keep making videos like this! really helpful!

[@joseluis8291]

Thank you man! I needed this explanation :)

[@genavieve1993]

You just saved my life, thank you

[@NC-mv1rw]

Great video I finally figured out how to plug in the numbers correctly

[@Yikkoofficial]

You, sir a re a life saver!! You explained this very well. Thank You

[@kimberlyr2289]

I curious why you have 1/4^2 in the value for n1. My text book says n2 must be larger than n1.

[@angela1madrid]

Kimberly R You are correct, he did it wrong

[@capnhatrick4402]

n1 < n2

[@LoboOutdoor]

I think he meant to put Final orbit - Initial orbit. Because the electron is going from 4 to 2. Not 2 to 4.

[@VersionCity]

Thank you NATErtot!!

[@jonpro15]

Thank you so much! Appreciate the help!

[@kinghenry238]

Could you do some more light problems with photons?

[@ivaniceberg]

oldy we miss ya

[@arbihirchi]

great explanation, thank you :)

[@midgetking101]

What if it asks for the state of the electron? How would you solve for n?

[@benrice117]

man your saving my ass with my chemistry assignment rn thank you

[@horsesofcourses1]

At the beginning he has it at 1.0974E7, so it's correct.

[@ndinelaondapa8030]

Thank you Sir that was really good explanation

[@mahdiimamnasif4811]

its really helpful and clear
...

[@maxifitness7526]

Dude USISIKHOKHO!! GOD bless you!!

[@Robert-eh1dq]

it's a good video. The only thing wrong is that it's final - initial... not inital -final

[@biologyworkout693]

Robert Perez initially electron was in the outer orbit when it comes to the lower orbit which is the final one emits the radiation hope you understand...

[@lifegame6095]

isnt it going right suppose to be positive?

[@xxkillazzzb8505]

thanks so much great explanation

[@Amstrup77]

That wavelength is NOT red, for anyone considering using this for their exam.

[@avneetsingh3376]

shut up stupid yes it is, chemistNate is never wrong

[@Aurelius11605]

blue

[@ypressey]

Thank you sooo much!

[@cuarz626]

I don’t even know how I ended up here but I feel like I found gold T-T Ty so much now I get it

[@elwiwi43]

My teacher could never lol

[@DasiSilver]

Thank you!

[@andreavalencia9908]

sir, what if the nth level is not given?

[@cppdev2729]

why did you just eat the negative sign?

[@ddunn987]

Appreciate this

[@Jebidee]

perfect thank you!

[@rajraushan258]

thanks Sir

[@nataliahelms4683]

Isn’t it final-initial?

[@coolaverage2017]

yes

[@BOLYANA]

No

[@janetmarigold6095]

In India we have to learn this and a lot more than this when you are 15 year old itself 😢

[@zuhairreza]

Thanks! 😀😀😎

[@marksteve8373]

The colour was green and thanks for the explanation!

[@williamrundle9757]

Thank you

[@janann4211]

sir is saying correct all students donot put wrong comment .that is rydberg

[@godofsayians6162]

thank you . thank you. thank you. God bless you . 😻😻 . You helped me alotttttttttt😊😊😊

[@savionramsundar1935]

n2 is the larger number.

[@nevermindnkwinika5070]

the wavelength is not at the visible light

[@ihabhakkar776]

how can hydrogen atom have more than one energy level????

[@pwettyniyaXOXO]

Thank youuu

[@annedeguzman5216]

thank you

[@roopamn9691]

Plz guys HELP🙏🙏........is rydberg constant used only when hydrogen atom undergoes transition from an energy level with n=4 to an energy level with n=2?????........plz answer for this 🙏🙏🙏😫😓😢😳

[@roopamn9691]

Plz answer guys 🙏😭😳

[@akhileshKumar-ef6kl]

Thanks

[@owenwillfindyou334]

anyone else cramming for a chemistry exam?

[@chemistNATE]

Nah bro just u

[@aerwrodriguez-williams9541]

My teacher told us to use -2.178x10^-18 instead of what he used for Rh. What am I doing wrong?

[@flymetothemoon6882]

I don't get it, when he was dividing the answer by 1, why didn't he get a negative answer? I don't know what i did wrong ahh

[@angela1madrid]

***** If you get a negative number you did it wrong. N1 should always be the smaller number and N2 should be the larger number. You should not get a negative number.

[@thajasnethomas778]

angela1madrid but the formula says initial - final (verified with my text book as well).. so I guess he got it as a negative answer.. but as far as the wavelength was concerned.. he just probably ignored the sign as wavelength can never be negative...
But I did refer to some other videos and they do tell that n2 > n1 always.. I am stuck too.. but I would rather stick to the above concept.
Do correct me if you find it wrong..

[@mosesmuhane]

The same problem am having as well coz when you divide by one , it’s supposed to give a negative result.

[@tar2c690]

Dude, the answer is negative not because it emits light but because it should be (1/4 - 1/16)
not (1/16 - 1/4)

[@paulromano5137]

your burnt, do some algebra and you can see how it gets rearranged into this.

[@hardawindersinghdeosi4892]

you have ignored the rule that n2>n1

[@arjitlalotra614]

Isko caluculaor ke bina calculation hi nahi aati.

[@faridb40]

Sorry, but you have a wrong answer because your constant is wrong. It should be 2.18E-18 J. At least thats what my instructor told me.

[@thajasnethomas778]

Farid Barak this same constamt can have multiple values.. what he used it was for m while the constant you are talking about is with Joules..
Hope you got it..

[@taxha7506]

🤗🤗🤗🤗