
#1
Oct2405, 06:34 AM

P: 36

Q: What are the widths of the wavelength intervals over which (a) the Lyman series and (b) the Balmer series extend? (Each width begins at the longest wavelength and ends at the series limit.) (c) What are the widths of the corresponding frequency intervals? Express the frequency intervals in tetrahertz (1THz = 10^12 Hz).
Dont understand what to do  and dont really understand Balmer and Lyman Series either  Any help with this question would be appreciated  thankyou! 



#2
Oct2405, 07:19 AM

Mentor
P: 28,838

http://hyperphysics.phyastr.gsu.edu/hbase/hyde.html#c2 Zz. 



#3
Oct2405, 10:30 PM

P: 36

Yeh but what i dont understand is how many different energy levels there are for each of the series? Like does it go on forever or does it stop at a certain number? Ie they start at n = 2 or n = 3, but where do they stop? Do they go up to infinity? Is it as simple as plugging the number in for each energy level into the formula and determining the wavelength?
Thanks 



#4
Oct2505, 09:05 AM

Emeritus
Sci Advisor
PF Gold
P: 2,977

Balmer Series & Lyman Series 



#5
Oct2505, 08:04 PM

P: 36

The formula is 1/lamba = R (1/2^2  1/n^2)
sorry if that doesnt make sense But i will put in the number 2 in n for one wavelength and infinity for the other wavelength  and then subtract the 2 answers to get the wavelength range? Is this along the right lines? 


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