Here is the link.
I am a physics/astronomy HS teacher and considering getting some for students when we learn about star composition. We have the tubular and quantitative spectroscopes (my students call them pizza slices) but am curious about these. If you have used them and can give me your opinion? I would really appreciate it!
Hello!
I am STILL lost soul in a sea of code.
I Recently started a radio astronomy project. I have an idea for a black body spectral analysis program for plotting thermal intensity and frequency of celestial objects. The idea being that it could provide another type of spectral analysis of deep space objects. I feel if I can point my dish anywhere in the sky and plot graphs based on incoming wavelengths and intensity, then maybe I can use that to "see" the sky in data alot easier. This is the hope at least, and if not, maybe it could help make data more accessible for the amateur radio astronomer. ( there realy aren't many of us)
Gnuradio seems to have a way to turn code into "blocks" to be used as a intermediate between different functions such as filters,modulation, etc.
I am trying to create a program that takes Plancks law and takes data collected from a radio telescope and plots intensity and wavelength of the incoming signal.
The below program seems the basically work, but it prints based on static parameters from within the program.
Also if you run the program yourself, you will find an error code:
RuntimeWarning: overflow encountered in exp
intensity = a/ (wav**5) * (np.exp(b) - 1.0) )
From the research I have done it seems that there is an issue with the values being too broad. Is there a way I could remedy that by having more specific intensity ranges? The program seems to work with this error but it could cause problems in the future when trying to add input functionality so I would rather deal with it now, (or try to with your help).
My REAL question is; How would I go about creating input for data into this program to print plots based on data being received in real time?
Any help on this would be greatly appreciated.
The code I found on stack overflow is below, though I may not use this as is, it could be a great start to one of your own projects. this post will be updated as progress and components are built for testing. will move it to a better format eventually but this is fine for now.
import matplotlib.pyplot as plt
import numpy as np
h = 6.626e-34
c = 3.0e+8
k = 1.38e-23
def planck(wav, T):
a = 2.0*h*c**2
b = h*c/(wav*k*T)
intensity = a/ ( (wav**5) * (np.exp(b) - 1.0) )
return intensity
# generate x-axis in increments from 1nm to 3 micrometer in 1 nm increments # starting at 1 nm to avoid wav = 0, which would result in division bOkay so we used just a basic spectroscope to observe line spectra in lab the other day and some of the elements had very obvious lines and others (for ex Xenon) just had a full continous rainbow or had regions of continuous color and I was wondering why that is.
Is this a bug? It's impossible to find anything in there without it.
Hi, i would like to know if there is a way to change spectroscope~ windows size and type (hanning ecc...) or if there is another object doing such, thank you.
Hi Reddit!
I am Andrew Torelli and Iโm an Assistant Professor in the Department of Chemistry and the Center for Photochemical Sciences at Bowling Green State University (http://personal.bgsu.edu/~torelli/). I have a lot of experience working at the interface of chemistry, the environment, software, and citizen engagement. I teach various courses related to biochemistry, and lead a research lab focused on the relationship between the molecular structure and function of bacterial proteins.
Living near Toledo, OH, I was alarmed, as were many of my neighbors, by the devastating algal blooms in Lake Erie in recent years (http://www2.nccos.noaa.gov/coast/lakeerie/bulletin/bulletin_current.pdf). I want to help figure out why these are happening so we can try to stop this harmful environmental occurrence. Given that many places can be sources of phosphorus the algae eat, itโs important to measure water quality from as many locations as possible.
So along with some colleagues (Joe Chao, Alexis Ostrowski and others), weโve developed a spectroscope that ports onto a smart phone to easily enable citizen scientists to collect and measure scientifically useful data on water quality. We call our project Geograph http://geograph.agileoasis.com/ and weโre working with Rotary Clubs to measure water quality data around the Lake Erie basin in Ohio and Michigan.
Ask me anything about citizen science or what itโs like to develop instruments for non-expert citizen scientists.
Note: On June 7, 2016, I participated in a Congressional briefing on citizen science. You can find the video archive when itโs available via www.acs.org/scicon or https://vimeo.com/channels/acssciconhill
Iโll be back at 11:00am EDT to answer your questions!
11:00 EDT: Hello Redditors! I'm glad to be here now and will do my best to answer as many of your questions as I can!
1:00 EDT: Thank you all for your questions and comments. I have really enjoyed the opportunity to interact and hope it has provided you with useful resources. I truly believe citizen science to be a powerful paradigm, and I hope those who want to get involved will do so. Keep your eyes on SciStarter ( https://scistarter.com ) to find opportunities that matter to you, and the new open-access, peer-reviewed journal on Citizen Science: http://theoryandpractice.citizenscienceassociation.org Thanks everyone!
We used spectroscopes in our chemistry class, however I don't really understand how they actually work. What are they actually measuring? and how are they measuring this?
E: I understand they split the light, but how do they measure it.
This started from two things I noticed using Enchromas:
- yellow seems unaffected to me, but one of the two filter "notches" is in the yellow region.
- I've never noticed (until recently) any colors being suppressed by the filter notches - observation d) below.
So I found a cheap spectroscope made for gradeschool science class, which has a scale for quantitative comparisons. Observations:
a) White LED lamp - continuous spectrum, looking through Enchromas, the notches appear to be roughly 610-590 nm and 510-470 nm.
b) Compact fluorescent bulb - line spectrum with lines at 640, 630, 600, 560, 500, and 450 nm. The Enchromas suppressed the lines at 600 and 500 nm.
c) Yellow paint in sunlight - continuous spectrum brightest at yellow and tailing off on either side. The Enchromas suppressed the yellow part of the reflection a lot, but passed the spectrum on either side.
So it appears the even with much of the yellow light removed by Echromas, there is enough of the rest of the reflected spectrum for my brain to interpret the result as yellow, as if there was no filter.
d)'04 Saab radio display - line spectrum at 590 nm. The dashboard has two displays, the upper one for the radio and the lower one for the climate control. The climate control display has a continuous spectrum. With Enchromas on, I can see the lower one unaffected, but the radio display nearly disappears - very annoying.
Has anyone else noticed "missing" colors?
There have been a few crowdfunding projects (like SCiO ) that are working on Raman spectroscopes to help you identify the nutritional content of your food. There are also companies working on new technologies like crossmorphic sensors that can give full calorie counts. Anybody use one of these yet? How accurate are they?
edit: spelling error
