Make your own CD spectrometer
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- Опубликовано: 2 окт 2024
- How do we know what the stars are made of when we've never been to one? Dr Andrew Steele shows us how to make a spectrometer, a device used by scientists to analyse light, using a cereal box and a CD.
Credits
Written and presented by Andrew Steele
Videography by Tom Fuller and Andrew Steele
Telescope images courtesy of NASA, ESA, Hubble, AURA/Caltech
www.physics.ox....
Great video! Spectrometers are my favorite toys- I mean, tools :). Only thing I would say though is that sodium street lamps have 2 yellow emission lines, but they are both very very close to each other. You probably could get away with saying it is one line, however, because sodium’s emission lines are very very far apart. By comparison, it does indeed seem like one line. It doesn’t really matter in this case because most CD spectrometers are not usually this precision-tuned.
great video. great info delivered like a pro. props to u doctor. i say this as a 3rd semester dropout and amateur astronomer.
Cheers Andrew! Was very helpful with my schoolwork, :)
THANK YOU! this is so easy to understand. :)
thanks man you helped me with my science project
Fantastic Video!! Just Stumbled across your channel! loved the Video!
Thank you! Glad you stumbled here :)
This is a spectrum viewer more than a spectrometer. A true spectrometer would allow you to measure the wavelengths of the incoming light.
Amazing video, really fascinating and insightful explained in a clear understandable format.
Until you insulted ABBA. 2/10 overall. Shocked and disappointed.
(Just thought I should clarify this is a joke)
But seriously though, who doesn’t like ABBA?
As my first video there are lots of things I'd go back and change about it now but insulting ABBA is definitely one part I'd keep :P
... so my first attempt failed, but I used a different method involving a cardboard tube, second attempt provided some similitude of a color spectrum, but not clearly identifiable. Now this is just getting annoying. I'm thinking about painting the inside of the box black, maybe that will help. I definitely want adjustable slits and CD angle, just to see if those are off. Anyone have any suggestions?
really brilliant....thanks a lot.
hes like 'i fucking love abba.' neat video
cheers mate but Abba rules!
Why is it handheld spectrometers aren't a household device? Seems pretty darn useful.
petition to replace shampoo with spectrometers ! Whose with me ??
thank you very much. I have a question. I am thinking of using lenses (as in a telescope) to create a high density beam to throw on the CD, Will that work ???
been wondering what to do with my ABBA compilations CDs .. thanks :)
fantastic! thank you!
Thanks! Clear and easy to understand. Great job!
Man that's cool
so cool !
Brilliant! (No pun intended.) 😊😊😊
Cheese would melt
#science
Normalize the audio, you know what that is?! :(
hey can you tell me what would be the exact distance of the source (bulb) and the slit of the cds ? how will you determine this ? is there any exact formula for this ?
vi que hay espetrometros que se hacen con una "grating" por la cual atraviesa al luz, y no que se refleja. incluso con el mismo CD. si se retira la película metálica se puede hacer un "grating" casero. pero no se como es la estructura, ni como se produce la interferencia. ¿me podrias recomendar algun link o algo donde lo explique?
Brilliant, great editing and presentation, will be using this to show my classes who are being introduced to spectrometers as part of their GCSE Science Core course. Many thanks.
I just see what is getting reflected. I just see a mirror image. I don't see any color spectrums.
I have this problem too!
I only have a small pancake box about 1/4 of the size of your cereal box but it's like the shape of that cereal box that you used, can i use it for this project? I really need fast response because my project is due this thursday
girl me toooo
very good... I'll make too...
Were the spectra for all 3 light sources the same or different?
ABBAcadabra
Thanks for this video, I have always wondered if you could use a CD as a kind of diffraction grate. You mention the tracks on a CD and the data is stored as pits representing a binary '1'. On a music CD, would the pattern of pits affect the diffraction of light? I am thinking of saving a totally over-exposed (all white) RAW image many times over on a CD to get a more uniform pattern of pits on the disk. Do you think that is worth doing or just a stupid waste of time? I will keep my ABBA disk in the car. :-)
I don’t think it will make a great deal of difference! But if you are interested, the easier solution might just be to use a blank CD, which will be uniformly unwritten as opposed to written?
It's an important tool in chemistry too.
who could possibly not like this... who?
That was an excellent presentation. Clear and interesting. Well done.
Benson Ngo brought me here
Can't this be done with diffraction grating film? I can't get anyone doing a video using the stuff.
Got ya covered, mate
ruclips.net/video/aTAFBd1EQcE/видео.html (requires some assembly and handiness
tried and failed :(
hahahaha loser
He's so robotic...
that's magnificent
Great , simple , to the point
Do you think it is possible to use a similar equipment to identify the element composition of a metal surface?
If you shone a white light on a metal, it would have shadows that correlate with the size of the atoms that make the metal. However, these shadows are pretty small. You'd need a microscope (1000x zoom or more) to get a good look at where they are.
+Andrew Crawford > "If you shone a white light on a metal [...]"
It could be a spotlight like those from a standard projector?
> "[...] it would have shadows that correlate with the size of the atoms that make the metal."
This shadows would be in the visible spectrum? Or it would be necessary a UV/IR sensor?
> " You'd need a microscope (1000x zoom or more) to get a good look [...]"
Do you think it's possible to identify whether a gold coin is fake or not by looking at the rainbow coming through the CD and look for those pretty small shadows (gaps) with a microscope?
wow thanks buddy! i own a science channel myself , if you wanna collab one day hit me up at my website , bridget and co , xoxo gossip girl
I liked this until he had a go at Abba. I will still give it a thumbs up, but I want to register my protest.