## 1.11 [ENDORSED]

$c=\lambda v$

Hyein Cha 2I
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### 1.11

So the question is

"In the spectrum of atomic hydrogen, several lines are generally classified together as belonging to a series(for ex, Balmer, Lyman, Paschen series), as shown in figs 1.1 ans 2.1. What is common to the lines within a series that makes grouping them togehter logical?"

I was confused in general about what these series are, or what their purpose is. Can someone please explain?
Also, what does 'the principal quantum number for the lower energy lvl' mean?

Thanks!

McKenna disc 1C
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Joined: Fri Sep 29, 2017 7:04 am

### Re: 1.11

This refers to the value of n for the lower energy level. For the Lyman series n=1 at the lower energy level, for example. In all honesty I don't know what these lines mean/their importance, so I am wondering that as well?

Shawn Patel 1I
Posts: 54
Joined: Thu Jul 27, 2017 3:01 am

### Re: 1.11  [ENDORSED]

Hey,

The series consist of the lines that are grouped together based on their lower energy principal quantum level. Each series has the same principal quantum number associated with them, so the Lyman series has a lower energy level of n=1. The series are just a convenient way to associate the lines. The lines are the wavelengths of radiation that are emitted, like how in the Balmer series, there are lines that are colored which show the visible spectrum of radiation. Principal quantum energy level means are just the overall energy levels of the atom.

I hope this helps.

AtreyiMitra2L
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