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Bohr Model 
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#1
May505, 08:41 PM

P: 33

could i get help or a formula for this question please
Use the Energy Levels for Hydrogen to calculate the wavelength corresponding to the following electron transition Transition Energy in ev's Emitted wavelengths in m 2>1______ ________x10______ 


#2
May505, 08:47 PM

Sci Advisor
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PF Gold
P: 4,772

Here's a formula you can use after you've discovered how many energy is contained in the photon emited during the transition of the electron
[tex]E=hf[/tex] where f is the frequency of the photon. How are frequency and wavelenght related? 


#3
May505, 08:51 PM

P: 33

taht is the question im as stumped as you are tahts all the info i have i had taht equation though it doesnt haev wavelength also how do i find the energy?



#4
May505, 08:58 PM

P: 91

Bohr Model
I dont think quasar is stumped, i think he was asking you a question which has an answer. The energy should be a given, or predicted by the bohr model. Think back to waves what other equation relates wavelength and frequency.



#5
May505, 09:03 PM

P: 33

well speed of sound divided by wavelength =frequency



#6
May505, 09:05 PM

P: 33

is taht what you were asking for?



#7
May505, 09:07 PM

P: 2,219

A photon travels at the speed of _____



#8
May505, 09:13 PM

P: 33

hf is the energy of the radiated photons
thats all i got 


#9
May505, 09:18 PM

P: 2,219

Ok, a photon travels at the speed of light. If its energy is given by hF, then the relationship
c = (Frequency)(Wavelength) should give you its wavelength. All you ahve to do is find the energy drop from 2>1 and solve this equation and plug it into the E = hF one. 


#10
May505, 09:33 PM

Sci Advisor
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PF Gold
P: 4,772

So speed of light divided by wavelength =frequency. 


#11
May505, 09:42 PM

P: 33

k so correct me if im wrong 21 =13.6 evs and w =13.6evs/6.63e34
? 


#12
May505, 09:52 PM

Sci Advisor
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PF Gold
P: 4,772

You're looking for the energy it has lost in going from state n=2 to state n=1, hence you want the difference between the energy of n=1 and the energy of n=2: [tex]\Delta E = E_f  E_i[/tex] 


#13
May505, 09:55 PM

P: 33

12.2? is that it? nope it was 10.2



#15
May505, 10:37 PM

P: 33

hmm i got 1.15e53
10.2/1.6e19/6.63e34 its not right thought i think i missed soemthing wait is this is my freqwuancy correcT? 


#16
May505, 10:57 PM

Sci Advisor
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PF Gold
P: 4,772

1 kg = 1000 grams, so 2.3 kg = 2.3*1000 = 2300 grams.
Same thing here: 1 eV = 1.6*10^19 J, so 12.2 eV = 12.2*1.6*10^19 J. 


#17
May505, 11:01 PM

P: 33

ahhh i devided instead of multiplying



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