# Search results

1. ### Visible light and wavelengths

Homework Statement Ok I have two questions. 1. Light waves of which wavelength will destructively interfere due to the thickness of the bubble film? The bubble film thickness is 165 nm, with an index of refraction of n = 1.3. a= 430 nm b= 650 nm c= 860 nm d= 285 nm 2. You are...
2. ### De broglie wavelength and orbits

Homework Statement If the be Broglie wavelength associated to the first orbit of the electron inside the atom of hydrogen is 62.4 nm, what is the wavelength associated to the fourth orbit? 1. 62.4 nm 2. 124.8 nm 3. 312 nm 4. 249.6 nm Homework Equations # of...
3. ### Uncertainty principle and hydrogen atom electron

Homework Statement Using the uncertainty principle find the energy required for the electron to be confined inside the hydrogen atom. Use the radius of the atom 1 x 10-10 m for Δr. Express your answer in eV, rounded up to the nearest hundredth. Homework Equations ΔxΔp\geqh/4pie...
4. ### Uncertainty principle

o ok. and for the momentum. would i just use mass and velocity of an electron?
5. ### Uncertainty principle

Homework Statement Using the uncertainty principle find the energy required for the electron to be confined inside the hydrogen atom. Use the radius of the atom 1 x 10^-10 m for Δr. Express your answer in eV, rounded up to the nearest hundredth. Homework Equations Δx(Δp)\geqh/4pie x=...
6. ### Need help! quantum physics

alright. so i solved for n and i got 1.08 and since only integers are accepted i would round off to 1 right? and since k=1 and n=1 how do i know whether it is absorbing or not? and how could i solve with the other equation? once i found the energy of the photon what would i do after?
7. ### Need help! quantum physics

o ok. well the energy of the photon would be hc/lambda which would be 2.1 eV nm but why do we need this? i thought that you could just find n by putting in lambda and k (fundamental state) on the 1/lambda=1/k^2-1/n^2 and solving for n
8. ### Need help! quantum physics

electron volts. so we find n first right
9. ### Need help! quantum physics

ok appreciate your help. heres the question A photon with λ = 600 nm interacts with a hydrogen atom in fundamental state. Will the photon be absorbed? Justify your answer. and btw im homeschooled and im taking the ut austin high school program, and we dont get text books but its an online...
10. ### Need help! quantum physics

Homework Statement ok so i know whenever a photon is absorbed it will jump up a energy level and when it is emmited it releases energy. but my question is, for example, if k=1 (fundamental state) in a hydrogen atom and they give you the given wavelength of the photon, you solve it and you...
11. ### Absorbed photons, emmited photons

o ok. but if k=1 and i get n=1.08 and since only integers are accepted would it round off to 1 and not absorb? or since it is a larger number than 1 it would absorb? btw if it absorbs, would the rest of the energy that was left that didnt absorb turn into kinetic energy?
12. ### Absorbed photons, emmited photons

Homework Statement how can i tell if a photon is being emmited or absorbed? Homework Equations hc/lambda= energy per photon 1/lambda=r(1/n^2-1/k^2) The Attempt at a Solution photons are absorbed when the energy of the photon= energy of transition? when are they emmited? and i...
13. ### Wavelengths of photon

o ok. stupid me i see what i did now. and btw how do you know when a photon is absorbing energy? is it when the photon energy is the same to the energy transition? but im kind of confused because i thought they were always equal to each other
14. ### Photons and quantum physics

o ok. so this wouldnt absorb, because if n is equal to 1 it still wouldnt absorb because the energy of transition would not be equal to energy of the photon right? hf= 2.1 energy of transition (if n=1) i= 0 and a number like 1.08 could not be used only integers right? so that is why is no...
15. ### Wavelengths of photon

Homework Statement The wavelength of the photon emitted when a hydrogen atom undergoes a transition from the k state to the n = 1 state is around 94.8 nm. How much is k? Homework Equations 1/lambda= 1.97x10^7(1/1^2-1/k^2) The Attempt at a Solution...
16. ### Photons and quantum physics

ok so if its off by .08 to being a integer it wont absorb?? and you said that energy of photon has to be equal to transition energy to absorb... but isnt it always equal?? because photon= hc/lambda, but energy transition= the same thing. so doesnt this say that it ALWAYS absorbs because it will...
17. ### Photons and quantum physics

wait. nm i did it the other way anyways R(1/1^1-1/n^2) i did the formula like this up there to get n=1
18. ### Photons and quantum physics

o so is it supposed to be R(1/1^2-1/n^2)?? i put R(1/2^2-1/n^2) because i assumed it was in the visible light (balmer series) because 600 nm is visible light.
19. ### Photons and quantum physics

o ok. so.. 1/6x10^-7=1.097x10^7(1/2^2-1/n^2) .1519295047=1-1/n^2 1.179147259=n^2 1.08=n so since n=1 that means that it will absorb because it is the same energy as the fundamental state? btw. what if it was larger like n=2? would that mean it emits part of the photon into kinetic...
20. ### Photons and quantum physics

Homework Statement A photon with λ = 600 nm interacts with a hydrogen atom in fundamental state. Will the photon be absorbed? Justify your answer. Homework Equations hc/lambda= energy of photon 1/lambda= R(1/2^2-1/n^2) (visible light) c= speed of light lambda= wavelength h=...
21. ### Quantum physics

o ok that helps a lot and saves a lot of time thanks :)
22. ### Quantum physics

ok i think i got it. how does this look 4.14x10^-15(c/5x10^-8)= 24.84 eV 24.48-13.6= 11.24 eV of excess kinetic energy and it would ionize because it is now positive. and for B would i just do the same thing but in joules? 6.6x10^-34(c/5x10^-8)= 3.96^-18 3.96^-18-2.178961169x10^-18= 1.78x10^-18...
23. ### Quantum physics

ok. i got that. but how do i get the energy of the photon? is it h(c/lambda)? c= speed of light lambda= wavelength?
24. ### Quantum physics

ok. so what if its in a bound state, doesnt it need to jump from a bound state to a free state to be an integer because it needs to have a positive value. and i used the formula that you showed me, but what is h? i just did neu=c/lambda-13.6 and i got 1.1 but that is not the kinetic energy cus...
25. ### Quantum physics

ooo ok. i understand the question now, but would 1.1 just round off to 1? and if it would how is that ionized, if the electron has -eV? and if it doesnt round off then what would happen because i know only integers are for n. and for b? because i know to find the energy of the orbit is -13.6...
26. ### Quantum physics

Homework Statement A hydrogen atom has an electron in the fundamental state. a. Show that a radiation with λ = 50 nm will ionize the atom. b. What will be the excess kinetic energy of the electron in joules? Round up your answer to the nearest hundredth. Homework Equations 1/lambda=...
27. ### Bohrs quantum model

yes ive already seen it in wikipedia and hyperphysics, i understand the whole concept im just not sure what the answer would be. I know bohrs model represents how negative charged electrons encircle the positive and might jump back or fourth a orbit depending on the electromagnetic energy it...
28. ### Bohrs quantum model

Homework Statement In Bohr’s quantum model of the atom: 1. The energy of an electron inside the atom is an integral multiple of 13.6eV. 2. Electrons lose energy and spiral into the nucleus. 3. Gravitational forces are offset by electric forces. 4. Electrons do not radiate...
29. ### Wavelengths and Balmer series

o ok i got it. wavelength decreases when you increase n thanks appreciate your response
30. ### Atomic models and coloumbs law

o ok i think that should work i was doing it by inserting 9 x 10 ^ - 31 so i think your way should work. thanks for the replies and for helping me out with my question