Reviewed by Theodore Wang

Keywords (Google): Emission Lines, Absorption Lines, Electromagnetic Radiation Check

Synopsis: Elements emit only certain colors when they emit light. These colors make up what is known as atomic spectra. Electromagnetic radiation includes all forms of waves, but atomic spectra focuses specifically on visible light. An important machine for measuring light that was emitted is called the spectroscope. It measures the wavelengths of measured light. Electrons are in certain energy states around an atom. When excited by a photon, they go up to higher energy levels. Eventually they fall and emit energy in the form of light. This is measured by the spectroscope. Since electrons can only be at certain energy levels, they can only emit energy numbers between those levels. That means they emit specific energy, and thus specific light. This specific light is then analyzed by the observer.

2. I thought the module was ready to be vet2 level. It has correct spelling, accuracy, and good organization.

3. I thought the introduction successfully talked about the basics of the topic and prepared for the rest of the module. Having the table of variables and constants was an excellent idea. I think it provides some basic things to take away from this module no matter how much you read. Electromagnetic radiation was explained well, but unfortunately a true connection between wave/particle duality was never fully established. Here I think a more thorough explanation is due or at least a reference to the page that explains it. Everything is fine with the units and spectroscope sections. The next section is well explained, but I think for a textbook level the equations deserve some explanation. As of now they are simply shown, but I think they should have some sort of background as to how make sense. If not, at least have links to the pages that would appropriately explain them. The section on absorption lines section is well explained with the diagram. It was interesting to have a small section on the applications of this idea. The pictures compliment the text well. I thought they were important in understanding what was going on. Legends were not necessary, but the main improvement I would suggest is an enlargement of the photos. It is difficult to see exactly what is going on with the prisms and could be clearer. There are plenty of diagrams to explain what is going on though. The table at the beginning was quite useful. It laid out what was being talked about in the module efficiently. I do not think there need to be additional tables nor does this one has to be changed. In general the organization was logical and understandable. I do not think topic sentences are necessary. The titles provide good pointing towards what is going to be talked about in the paragraph.

Plagiarism Checks: plagiarismchecker.com did not find anything suspicious. Dustball.com did find one match which was that the “electromagnetic spectrum is the range of all possible wavelengths.” It’s hard to know if this was plagiarized or the best way to explain it. The articlechecker did not match any phrases. There does not seem to be plagiarism.

Figure Check: None of the pictures had resulting matches on tineye.

1. synopsis: Certain wavelengths emitted by atom reflect different colors. These wavelengths and corresponding colors are in order; it is called atomic spectra. Since energy moves in form of electromagnetic radiation, wavelength and frenquency of energy can be obtained by equation ν= c/λ. Energy can be obtained by equation E=hv, where h is Planck's constant.

2. Key word: atomic spectra, emission line, absorption line.
No plagiarism

3. This is a very good module because it provides broad range and various aspects of atomic spectra. It Additional figure of spectrum should be added in the text to help describe atomic spectra. Enlarge images in the module will make more sense.

5. 0/108 No plagiarism

1. Synopsis: When the atoms of elements are excited, they emit a unique set of colored lines, which helps identifies elements. When atoms absorb photons, they are moved up into a higher energy level. It is when the atoms move down in energy level when light is then emitted. Light can be measured an analyzed by using an spectroscope.

2. The module is almost ready to go to Vet2 level as the module is well organized and the information is clear. However, the module could be explained a little further to help clarify certain ideas.

3. Review Details: I thought that the module was well organized and clear enough for the reader to understand. The ideas were presented well and were easy to follow. The figures used are clear and informative, however, they could have captions explaining each figure more in detail. There was little grammar mistakes and spelling errors.

4. I added the "According to the wave particle duality concept" into the first sentence of the second paragraph of the Electromagnetic Radiation and Wave Particle Duality section to further develop the sentence.

5. No plagiarism was detected by the three plagiarism websites.

6. No images were taken from commercial sites.