1.15


Moderators: Chem_Mod, Chem_Admin

Essly Mendoza 1J
Posts: 25
Joined: Fri Sep 29, 2017 7:04 am

1.15

Postby Essly Mendoza 1J » Thu Oct 12, 2017 10:53 pm

Hi guys, does anyone know how to get started on this problem?

In the ultraviolet spectrum of atomic hydrogen, a line is observed at 102.6 nm. Determine the values of n for the initial and final energy levels of the electron during the emission of energy that leads to this spectral line.

Alex Nechaev 1I
Posts: 50
Joined: Fri Sep 29, 2017 7:04 am

Re: 1.15

Postby Alex Nechaev 1I » Thu Oct 12, 2017 11:02 pm

The first thing I did was use v=c/λ to find the frequency of the wave. The value you get here can then be used to evaluate for n(final) in Rydberg's formula, since you know that n(initial) is 1 (because hydrogen starts at n=1). After plugging in all of your calculated values, all you have to do is solve for n(final).

Gabriela Carrillo 1B
Posts: 53
Joined: Fri Sep 29, 2017 7:04 am

Re: 1.15

Postby Gabriela Carrillo 1B » Thu Oct 12, 2017 11:03 pm

I also had a question on this problem, in the solutions manual it plugs in 1 for the value of n1. Should we assume that the initial energy level is always 1? Or is this specifically for hydrogen??

David Minasyan 1C
Posts: 54
Joined: Thu Jul 13, 2017 3:00 am

Re: 1.15

Postby David Minasyan 1C » Thu Oct 12, 2017 11:08 pm

Yes from what I was told today in my discussion, you can assume that n1 is 1 if it's not given to you.

Girija_3E
Posts: 27
Joined: Fri Sep 29, 2017 7:07 am
Been upvoted: 1 time

Re: 1.15

Postby Girija_3E » Fri Oct 13, 2017 11:20 am

Alex Nechaev 1L wrote:The first thing I did was use v=c/λ to find the frequency of the wave. The value you get here can then be used to evaluate for n(final) in Rydberg's formula, since you know that n(initial) is 1 (because hydrogen starts at n=1). After plugging in all of your calculated values, all you have to do is solve for n(final).


I found the frequency first as well. But, is the way that we know that n = 1, because the problem specified that we were considering the ultraviolet spectrum, in addition to the fact that the problem is about hydrogen?


Return to “Properties of Light”

Who is online

Users browsing this forum: No registered users and 1 guest