## Electromagnetic Spectrum

H-Atom ($E_{n}=-\frac{hR}{n^{2}}$)

Jessica Esparza 2H
Posts: 130
Joined: Wed Sep 18, 2019 12:15 am

### Electromagnetic Spectrum

Hi everyone! This question in the post-assessment for atomic spectra, it just made me wonder if we need to know what wavelengths correspond to which part of the electromagnetic spectrum. This is the question for reference.

In the hydrogen atomic spectrum, what is the wavelength of light associated with the n = 4 to n = 1 electron transition? What part of the electromagnetic spectrum is this wavelength?
A. 1.03 x 107 m; radio waves region
B. 9.73 x 10-8 m; UV region
C. -9.73 x 10-8 m; visible light region
D. -2.044 x 10-18 J; gamma-rays region

chemboi
Posts: 101
Joined: Sat Jul 20, 2019 12:16 am

### Re: Electromagnetic Spectrum

I think the spirit of this questions is enforcing the concept that the Balmer series is visible spectrum, and Lyman is UV.

Victor James 4I
Posts: 50
Joined: Wed Sep 18, 2019 12:20 am

### Re: Electromagnetic Spectrum

I heard we wouldn't be asked questions like this on the midterm? but dont take my word for it

ValerieChavarin 4F
Posts: 99
Joined: Wed Sep 18, 2019 12:18 am

### Re: Electromagnetic Spectrum

I don't believe we have to know what frequencies correspond to what, but i do think it's good to be familiar with the visible light spectrum. This questions was more based on vaguely knowing the Balmer and Lymen series.