first hand-drawn holograms, 1994 Video
See http://amasci.com/holo/ Scratch-holograms can be made upon CD/DVD cases or other soft plastic using a couple of thumbtacks poked through a stick. Or get fancy and use a professional compass and black-painted polycarbonate plates. Or automate the process with a paperclip stuck into a motorized electric eraser, or a CNC mill with a drag-engraving tool.
For lots of hints, see http://amasci.com/amateur/holohint.htmlBest is to use a good $10 compass, soft plastic that's slightly greasy, and replace the extremely sharp compass needle with a small finishing nail. Clear plastic works fine, or place some dark paper behind it.
Are these genuine holograms? Abrasion holography or "Chatoyant holograms" employ the same physics as white-light or "rainbow" holograms invented by Stephen Benton at MIT. Benton holograms reflect light from a point source, and they do not require any interference pattern. This is why a Rainbow Hologram functions the same under any wavelength of illumination. The fringes of Benton holograms can have any spacing: even spacings much wider than wavelengths of light. Said another way: if the holograms on your credit cards are genuine holograms, then also "Scratch-holograms" must be genuine holograms. See http://amasci.com/amateur/holo3.html
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Lots more stuff at SCIENCE HOBBYIST http://amasci.com/unew.html
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Note: trolls & spammers blocked instantly. Zero tolerance.
About the Site 🌐
This site provides links to random videos hosted at YouTube, with the emphasis on random. 🎥
Origins of the Idea 🌱
The original idea for this site stemmed from the need to benchmark the popularity of a video against the general population of YouTube videos. 🧠
Challenges Faced 🤔
Obtaining a large sample of videos was crucial for accurate ranking, but YouTube lacks a direct method to gather random video IDs.
Even searching for random strings on YouTube doesn't yield truly random results, complicating the process further. 🔍
Creating Truly Random Links 🛠️
The YouTube API offers additional functions enabling the discovery of more random videos. Through inventive techniques and a touch of space-time manipulation, we've achieved a process yielding nearly 100% random links to YouTube videos.
About YouTube 📺
YouTube, an American video-sharing website based in San Bruno, California, offers a diverse range of user-generated and corporate media content. 🌟
Content and Users 🎵
Users can upload, view, rate, share, and comment on videos, with content spanning video clips, music videos, live streams, and more.
While most content is uploaded by individuals, media corporations like CBS and the BBC also contribute. Unregistered users can watch videos, while registered users enjoy additional privileges such as uploading unlimited videos and adding comments.
Monetization and Impact 🤑
YouTube and creators earn revenue through Google AdSense, with most videos free to view. Premium channels and subscription services like YouTube Music and YouTube Premium offer ad-free streaming.
As of February 2017, over 400 hours of content were uploaded to YouTube every minute, with the site ranking as the second-most popular globally. By May 2019, this figure exceeded 500 hours per minute. 📈
List of ours generators⚡
Random YouTube Videos Generator
Random Film and Animation Video Generator
Random Autos and Vehicles Video Generator
Random Pets and Animals Video Generator
Random Travel and Events Video Generator
Random People and Blogs Video Generator
Random Entertainment Video Generator
Random News and Politics Video Generator
Random Howto and Style Video Generator
Random Education Video Generator