The MEaSURE Project @themeasureproject.bsky.social · 27/09/2026Adding multiple beams is a lot harder than overlaying images...I don't know how accurate this is but it's a first attempt. It may be that where beams overlap the colors get washed out, and you still may have red/blue fringes on either side. 120
The MEaSURE Project @themeasureproject.bsky.social · 27/09/2026This is absolutely amazing. I wonder if I can adjust my simulation to account for this. Thanks for introducing me to this topic! rainbowspec.observer/fog/rainbowspec.observerFogbows and Drop Size 110
The MEaSURE Project @themeasureproject.bsky.social · 27/09/2026That's fascinating! My simulation doesn't include the diffraction that causes that. I will have to be on the lookout for a fogbow! 110
The MEaSURE Project @themeasureproject.bsky.social · 27/09/2026I never thought to count! I'm at 157 right now, but I'm making more all the time. 000
The MEaSURE Project @themeasureproject.bsky.social · 27/09/2026If you're more of a Pink Floyd fan, then you might prefer the triangular prism refraction demonstration. www.desmos.com/geometry/kqs... 020
The MEaSURE Project @themeasureproject.bsky.social · 27/09/2026For the #BlueSkyArtShow, I'm going to take "any art, any interpretation" very, very liberally and share this interactive #Desmos graph I made that shows how rainbows are made from #Lights through a water droplet. "Reverse contrast" in the settings so it looks like: www.desmos.com/geometry/pzt... 3162
The MEaSURE Project @themeasureproject.bsky.social · 26/09/2026For less obvious reasons...A and C both look like symbols (N and √) so B is the odd one out there. A looks like it could be made from the most pieces (three lines and a cubic). C probably has the smallest integral, since it's the only one to go negative. 000
The MEaSURE Project @themeasureproject.bsky.social · 26/09/2026It's funny, I didn't expect ALL of them to be non-differentiable! But the first one appears to be the only one with an inflection point. The second one is the only one that doesn't appear continuous, and the third one is the only one made entirely of straight lines. 100
The MEaSURE Project @themeasureproject.bsky.social · 26/09/2026According to a magnetic declination map, I should expect about 11º from magnetic north. The expected was 11.7º, and my measured was 13.8º declination. Although, I had done the experiment the previous day and found that my compasses' north on Wednesday wasn't exactly the same as on Thursday 😅 000
The MEaSURE Project @themeasureproject.bsky.social · 26/09/2026Clearly, my camera and gnomon are not quite stable enough to remain perfectly still in even a slight breeze. I might want to invest in a better setup, or at least stabilize the video! There is a 2º difference between expected and measured solar noon, but the shadow length differnce is negligible. 100
The MEaSURE Project @themeasureproject.bsky.social · 26/09/2026Happy September, everyone! Whether you're enjoying autumn in the northern hemisphere or spring in the southern hemisphere, we're entering a season of moderate temperatures. I have been able to make some measurements this week...a full analysis to come, but I can share this in the meantime: 100
The MEaSURE Project @themeasureproject.bsky.social · 23/06/2026Here's how I used #Desmos to model a shadow's path across the ground on the solstice! You may find this method interesting or useful if you plan to join the MEaSURE Project this September, calculating Earth's radius in a global science experiment. youtu.be/F1Pv80Vwukkyoutu.beModeling the solstice shadowYouTube video by The MEaSURE Project 032
The MEaSURE Project @themeasureproject.bsky.social · 22/06/2026I'll have to finish this tomorrow...for now, here's a preview of my model! youtube.com/shorts/m6zLG...youtube.comMEaSURE #experiment for shadow measurementYouTube video by The MEaSURE Project 021
The MEaSURE Project @themeasureproject.bsky.social · 21/06/2026Doing a test experiment on today's solstice...results to follow! 002
The MEaSURE Project @themeasureproject.bsky.social · 20/03/2026May I feature this picture on the website? 100
The MEaSURE Project @themeasureproject.bsky.social · 20/03/2026Results updated! Combinations you don't see (1,5 and 2,4) were measured at the same location. I'm a little puzzled, because I thought I saw different numbers in there a minute ago. Will double check that everything is good on my end. Great job! 000
The MEaSURE Project @themeasureproject.bsky.social · 20/03/2026Happy equinox! If you're interested in making a measurement, here is a demonstration of the submission process. I also include a review of the results/analysis available to the public. youtu.be/PvO_FaWJnJIyoutu.beData submission demo - The MEaSURE ProjectYouTube video by The MEaSURE Project 013
The MEaSURE Project @themeasureproject.bsky.social · 16/03/2026This Friday, March 20th, let's do an experiment! The sun is directly over the equator on the equinox, which means that you can directly determine your latitude with a shadow. If we are east/west of each other, the time difference between our noons gives us a longitude. We can measure the Earth! 124
The MEaSURE Project @themeasureproject.bsky.social · 16/03/2026Thanks for this! I'm gearing up for this experiment...I hope my weather is favorable 😶🌫️ 010
The MEaSURE Project @themeasureproject.bsky.social · 24/10/2025The corners of each triangle are draggable, and it only works for angles in the first quadrant. 000
The MEaSURE Project @themeasureproject.bsky.social · 24/10/2025Here's a visualizer I made in Desmos to show to my students! www.desmos.com/calculator/m...desmos.comAngle Sum Identity 120
The MEaSURE Project @themeasureproject.bsky.social · 24/09/2025If you made a measurement this past equinox and haven't submitted it yet, please do! I will include it and update the results accordingly. If you find this project worthwhile or interesting, good news! There's another equinox in the spring! sites.google.com/view/themeas...sites.google.comMEaSUREMeasuring Earth's Size Using a Revision of Eratosthenes 000
The MEaSURE Project @themeasureproject.bsky.social · 24/09/2025With three measurers come three PAIRS of measurements. This means three independent calculations of Earth's radius. 100
The MEaSURE Project @themeasureproject.bsky.social · 24/09/2025Not unexpected, but participation is starting off slowly. I am hopeful that participation now will encourage more participation later. The best part is, every equinox's astronomical conditions are identical, so previous entries can still be part of the calculation! We have three data points so far. 110
The MEaSURE Project @themeasureproject.bsky.social · 24/09/2025Happy 2nd day of Fall! Fortunately I had the day off today (Happy Rosh Hashanah) so I was able to process the data and crunch the numbers. The results and data are available at my website now, but if you want to see a summary, read the thread! sites.google.com/view/themeas...sites.google.comMEaSURE - Results and analysisResults and analysis 100
The MEaSURE Project @themeasureproject.bsky.social · 22/09/2025🥳 First response! Thanks for participating! 010
The MEaSURE Project @themeasureproject.bsky.social · 22/09/2025Unfortunately, it's cloudy where I am today. I was prepared to take three classes outside to measure shadows! But I won't be able to contribute any measurements today. I'll try again in the spring! 110
The MEaSURE Project @themeasureproject.bsky.social · 15/06/2025Oh my goodness, these are awesome! 010
The MEaSURE Project @themeasureproject.bsky.social · 13/06/20251. Find a flat, level surface 2. Set up a vertical ruler 3. Find true North (northern hemisphere) or true South (Southern hemisphere) 4. Wait for the equinox 5. Measure the length of the shadow at solar noon 6. Record the time of solar noon (UTC) 7. Go to the MEaSURE website and submit your data 031
The MEaSURE Project @themeasureproject.bsky.social · 10/06/2025Math teachers! I have your lesson plan for the next equinox...Monday, September 22. Join a global experiment to calculate Earth's radius! youtu.be/myvEWdLU_1E #iteachmath #math #maths #teachyoutu.beThe MEaSURE ProjectYouTube video by The MEaSURE Project 001
The MEaSURE Project @themeasureproject.bsky.social · 01/06/2025New short! First short, actually 😅 youtube.com/shorts/r9rtr...youtube.comThe MEaSURE Project #mathematics #school #experiment #math #maths #globe #short #scienceYouTube video by The MEaSURE Project 010
The MEaSURE Project @themeasureproject.bsky.social · 31/05/2025@petraschwer.bsky.social Thank you for sharing my post! This experiment's first attempt was done with help from a school in Leinfelden-Echterdingen, not far from you! 010
The MEaSURE Project @themeasureproject.bsky.social · 31/05/2025Hello STEM teachers! As the school year wraps up and you begin to make plans for next year, I've got something you might like to check out! This experiment can be done anywhere in the world, from elementary to advanced. See the video for details! youtu.be/myvEWdLU_1Eyoutu.beThe MEaSURE ProjectYouTube video by The MEaSURE Project 001
The MEaSURE Project @themeasureproject.bsky.social · 03/05/2025To organize participation and distribute resources, I've built a simple website. Whether you're curious or you want to participate, come check it out! sites.google.com/view/themeas...sites.google.comMEaSUREMeasuring Earth's Size Using a Revision of Eratosthenes 000
The MEaSURE Project @themeasureproject.bsky.social · 03/05/2025Hello! This is The MEaSURE Project. I am organizing a bi-annual experiment among schools, students, and lifelong learners to measure Earth's radius. Please watch this informational video. Consider participating, and spread the word! youtu.be/myvEWdLU_1Eyoutu.beThe MEaSURE ProjectYouTube video by The MEaSURE Project 001