| Author | Comment | Last activity | Moderation | ||
|---|---|---|---|---|---|
| tmanmerlin | "Here is a view of my split DVD bottom (clear) and my split DVD-R (purple) " | Read more » | almost 6 years ago | |||
| tmanmerlin | "It occurred to me that the DVD I have been using may have been a DVD-R that was burned and published as a DVD. That may explain why It was so easy..." | Read more » | almost 6 years ago | |||
| tmanmerlin | "Although I am having problems with the geometry of the spectrometer, I was able to use a split DVD and get a spectra. No purple. Once I get my sp..." | Read more » | almost 6 years ago | |||
| tmanmerlin | "I split a software DVD and was able to get spectra from it. I asked because I had a question, and the question was, if a regular DVD would produce..." | Read more » | almost 6 years ago | |||
| Pushpaw | "I'm really puzzled as to where you are getting CDs and DVDs you can split. As far as I know all commercial pressed CDs are single layer and so are ..." | Read more » | almost 6 years ago | |||
| tmanmerlin | "Tried to edit my answer. I meant that since my split DVD bottoms didn't have purple, I was concerned they were not usable. " | Read more » | almost 6 years ago | |||
| tmanmerlin | "Just to be clear, If I can effectively split a CD, and get a clear bottom, it is totally usable. I see you are saying that, clearly, but want to b..." | Read more » | almost 6 years ago | |||
| tmanmerlin | "i got lucky on two ol DVD's, they split much easier than the DVD-R I got. I'm just concerned they would not be usable because of some other proper..." | Read more » | almost 6 years ago | |||
| tmanmerlin | "Hi, thanks. I read through this article, it implies that any DVD could be used, assuming it is splitable. But it doesn't specifically state if th..." | Read more » | almost 6 years ago | |||
| stoft | "True, the physical layer aspect is one issue. The other fundamental issue is the 'line spacing' of the recording 'tracks' which form the diffractio..." | Read more » | almost 6 years ago | |||
| MrBumper | "No a DVD is not suitable. The majority of pressed DVDs are single layer, so they cannot be split to expose the (grooves/pits and lands) diffraction..." | Read more » | almost 6 years ago | |||
| xose | "Hi @tmanmerlin and welcome to the publiclab. Find instructions to build the difraction grating here: https://publiclab.org/notes/MrBumper/01-11-20..." | Read more » | almost 6 years ago | |||
| Bronwen | "Hi @adamsanta, yes! We do ship some tape and a DVD with the lego kit. " | Read more » | about 6 years ago | |||
| lionheadrex | "THANK YOU!!! I'm terribly impressed that you could tell the circular grooves were horizontal. I'm going to have to tinker a little bit to make th..." | Read more » | almost 10 years ago | |||
| cfastie | "That looks like a good arrangement. The DVD grating might have to be rotated. The circular grooves in the DVD (concentric to the outer edge) should..." | Read more » | almost 10 years ago | |||
| lionheadrex | "Here you go. I've tried a variety of angles, and I can see some emmission spectra, but once I close the box it goes away and all I can see is dark..." | Read more » | almost 10 years ago | |||
| warren | "Hmm, can you upload a photo of the box with the new angled layout? " | Read more » | almost 10 years ago | |||
| amysoyka | "This is your box: |o> |=| |__|| Your pointing your camera directly at the double slit - you instead need to point it at the black of the wal..." | Read more » | almost 10 years ago | |||
| lionheadrex | "Hmmm... when I do this, I can get green and blue lines running the right way - until I close my box. Then they're gone completely and still all I ..." | Read more » | almost 10 years ago | |||
| cfastie | "The grating (DVD) bends the light as it separates it into colors. So the grating has to be at an angle to the light coming from the entrance slit. ..." | Read more » | almost 10 years ago |