EISCO - PH100QA Premium Quantitative Spectroscope, +/- 5nm Accuracy
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Student can use this spectrometer for a reasonable price. As with a prism, a spectrometer separates a beam of light into the different frequencies (colors) it emits. Chemistry and physics use spectroscopy to determine the properties of molecules and compounds. You can find more details at Wikipedia, for example look up spectrum, spectroscopy, frequency scope, etc. Since every type of atom or molecule emits or absorbs its unique spectrum, you can use it to analyze materials in an object, for example, air. A starry night, the sun, light bulbs, LEDs, fluorescent lights -- all these things emit bright light. Please be aware It is NOT a safe practice to use this spectrometer to compare the light of the sun or other bright In order to see these safely, it is not equipped with the necessary filters. An observer caught direct in the sun may damage his or her retina in the long run. Despite being invisible, the infrared spectrum is less than 10 percent of the spectrum of visible light. Despite this, it is dangerous for your vision. There will be no way for you to know
Light sources that emit light are not included in this. Those who work with stones will not benefit from this treatment.
The viewing window is difficult to point a camera through, but it can be done with some awareness. I am self-motivated Using timers can prevent you from having to hold anything still With a smartphone, I was able to capture the spectrum of a light bulb. You may benefit from having a steady mount for the spectroscope and/or the camera so that alignment can be achieved. Other answers to this question are available.
Selected User Reviews For EISCO - PH100QA Premium Quantitative Spectroscope, +/- 5nm Accuracy
It is well worth the effort. In testing the calibration, I use a CFL bulb that emits Mercury emission bands at approximately 436 and 536nm (far left indigo strip and central green strip). I find that these are usually within a few nanometers. According to the advertisement, it is 5nm. It has 10nm spacing between markings and the 436nm and 536nm lines can be seen at about 440 and 540nm respectively. If you find a way to decrease the size of the slot, then the spectral lines will become narrower but dimmer, one must narrow from both sides of the slot or else the line will drift off frequency. It has a kind of rough slot, but if it weren't so inexpensive, I might give it one star down. A look at the spectral lines shows that they are rough. In order to narrow the opening on both sides and make it more accurate, I will narrow the opening carefully on both sides.
I have a problem with reflections internally as well. As a result of injection molding, the inside of the case is shiny, and because of the shallow angles inside, light reflects off of it despite the fact that In order to make it look better, I plan to pop one apart and perhaps add some black felt to Although I can't give it anything less than 5 stars for being within +-$5 and working as it should, for being less than $5 I can't reduce it to 2 stars. A 5nm chip! Since I'm not sure Amazon will allow you to link to an outside website in a review, I'll just say that you can check out my test numbers by looking up "spectroscope cfl. ". Viewing the spectrum of lights around the house is a very illuminating experience (snerk). CFLs have discrete spectral lines, which is why their appearance is less natural than incandescent lights, which emit a continuous spectrum. However, the new LED light spectrum is nearly identical to the spectrum of an incandescent light source. By comparing them to the usual 2700k soft white LED bulbs in this way, I was able to roughly compare some 5000k bright white LED It is important to Without a doubt- In the 5000k there is a bit of a bump in blue, which can be seen Next, I would like to try attaching a webcam that does not use an IR filter. Oh, I wonder. You can get a Raspberry Pi Zero with a touchscreen and a camera.
The existing slit can be attached to narrower ones, which will make the scale less bright, and the scale can be covered. A Sun and a sky can both be seen as having absorption lines. In spite of its difficulty, it is possible to photograph spectra through a viewing window. As there is no baffling inside, there could be reflections that are distracting.
*****UPDATE***** I originally stated in my review that the numbers on the scale were virtually impossible to read. In fact, they already are. As an eye care professional and someone in their 59s with corrective lenses, this is a challenge. On the other hand, my students were pleased with these spectroscopes and were easily able to read the scales. Lab results were very accurate and the lab proved to be a success. There was about an even split between these and the Project STAR spectrometers we have. When I posted the review for my students, they were intrigued We all agreed that it needed to be updated. This is the original review (
) These would be useful for my middle school classes, if they could be used The numbers on the scale on the scale are virtually unreadable for spectroscopy lab students at school. Scales on spectroscopes we've used in the past (from Project STAR) are excellent, allowing for easy identification. In spite of my intention to save classroom dollars with these, I will be returning and ordering the Project STAR ones instead, which can also be found.
This information is useful, but try not to look at light that is too intense The protection was not provided. On mine, I put a warning label. The sort of thing a kid would use to look at the sun with definitely appeals to me. The manual doesn't seem to be being read. the plastic on top of it.
It is ideal for use in chemistry or physics laboratories. It is a great piece of equipment. This product was very reasonable in terms of price and performance. The units I have seen range from 6X- 8X The price of this unit, which does not perform as well, is 10X higher. The spectrum and scale are easily readable, as they are well lit. It may be possible to alter the collimating slit size to provide an even more crisp spectrum with a slight tweak.
Is what it claims to be. Having a diagram to show how this works would be incredibly helpful While I was trying to figure out what the eye hole contains, I promptly noticed that it is There are probably 2 sides to a piece Due to the width of the slit, there is no obstruction It is not possible to observe emission or absorption lines for monochromatic spectra. An LED, neon light, laser, or Geissler tube can be used to make emission lines (a high school physics department may have a set of these and can be persuaded to show them on parent nights). The night of the teacher). The following is an assignment for students to complete If a stoplight has a light in each of the four colors, is the yellow just one color or does it also have red and green LEDs?.
A diffraction grating by itself is not good enough. A big plus for me was the cheap price of this spectroscope. This can be improved by cleaning up the slits where the plastic from the injection molding was stored. The next improvement was to create a narrower slit using two pieces of aluminum foil taped onto the existing slit with the straight edges of the foil used closer together than existing ones. This worked better for my daughter instead of razor blades because she was safer. I chose this product over razor blades because the size of the slit could also be altered. My next step is to carefully open it up and cover it with matte black felt or tape to prevent reflections from overlapping with the spectrum of interest. Reflections can lead to confusion since they produce extra spectrums that can overwhelm the one of importance.
In this case, you get what you pay for, since it is a cheap instrument. In this case, if you realize it from the start, it is not a problem. Invest your money in something else if you are planning on doing detailed spectroscopy. There is a slit only a few millimeters wide, and the spectral bands are also just a few millimeters wide. This corresponds to a relatively wide wavelength variation of about 20-50 nanometers. The 30nm range. It is also necessary to backlight the wavelength scale, making reading the wavelength scale in the dark more difficult. It should be recognized from the get-go that these "problems" exist. It's a cheap method, but you can use it to split radiation into its constituent parts. It also provides a rough scale for taking measurements. The result is a person being able to get hours of learning from this product, and at a very reasonable.
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