Spectra Definition and 264 Threads

Hello everyone. In the literature I come across spectra data as in the examples below: English example: 1H-NMR (CDCl3) δ: 1.09 (3H, t, CH3), 3.77 (3H, s, OCH3), 3.97-4.28 (2H, m, CH2), 4.28 (1H, s, CH) 6.41 (2H, t, pyrrole-H), 6.78 (2H, t, pyrrole-H), 7.13-7.21 (5H, m, ArH), 8.53 (1H, d...

I did a spectroscope experiment with a hydrogen discharge tube. So far I got this data: Line 1: Color=Red \lambda(nm)=700 \nu(Hz)=4.2*10^{14} n1=? n2=? \Delta{E}(J)=2.8*10^{-19} E(J)=? This is only the data for the Red line. I figured if i knew how to do this, I'll...

I don't know a whole lot about quantum mechanics and there is something that dosen't make sense to me. An atom absorbes radiation in only certin frequencies. Do these frequencies have to be exact? Can they vary over a small range like say 1.000 to 1.001 or do they have to be perfectly exact...

What are reflectance spectra and synchronous spectra? What are the difference and which information I can obtain from them ?

64. Electromagnetic radiation provides a means to probe aspects of the physical universe. Which of the following statements regarding radiation spectra is NOT correct? a. lines in the infaret, visible, and ultraviolet regions of the spectrum reveal primarily the nuclear structure of the...

When radiation with a continuous spectrum is passed through a volume of hydrogen gas whose atomes are all in the ground state, which spectral series will be present in the resulting absorption spectrum? Where do i even start?

I'm looking for data on "acoustic noise" produced regularly by the earth, nothing man-made. In particular I'm looking for noise sources outside of the normal range of human hearing (20Hz-20kHz). Of course there are numerous terrestial noise sources, such as earthquake tremors, but those aren't...

Can somebody explain quantum tunneling to me? And the thing about why amplitudes when they are trapped, the energies must choose from a distinct set of values? And why when particles that are totally free to wander will have any energy that they like? Also, why in the atomic spectra, more...

Spectrum of a Rings So I think I'm finally getting the definition of a scheme, but the texts I'm using aren't exactly ripe with examples. So, I wanted to condier some ring spectra to construct examples... I played around with the simple examples Z and Z[x], and my next thought was to look at...

Let me see if I got this straight... The hydrogen spectra consists of a couple of series - Lyman, Balmer, Paschen, Brackett, etc - which all corresponds to a certain energy transition - Lyman (n>1 -> n=1), Balmer (n>2 -> n=2).. and so on... correct ? And since n=1 is the ground state, a...

Just a simple quickie, why are stars classified using the letters O, B, A, F, G, K and M? Is there any significance in the letters?

hello all i'm investigating the band gap of certain nanocrystallites in the powder form, using a Shimadzu spectrometer with the powder dissolved in ethanol. The spectra, however, come with several peaks in addition to the expected peak for absorption. This is not unexpected as transitions to...

We all know that Maxwell did such a great work for all physicist. BUT, anyone knows that how Maxwell's theory of radiation could not explain atomic spectra?

Hi, I need images of absorption and emission spectra for sodium to be used in a physics student book. Thanks in advance Stanley