Earthlight, on the moon is around 10 lux, so this is the best case. Browse by Author. Browse by Source. Cory Doctorow 3:00 pm Sat Nov 29, 2014. What If? via explain xkcd. |<
Transcript [Cueball points a laser pointer at the floor. Randall Munroe began his career in physics working with robots at NASA's Langley Research Center. [Rodney Lederer] and his cat were bored after moving to a new city. (Houghton Mifflin Harcourt, 2014) a book that did the math on outrageous scenarios, like everyone aiming a laser pointer at the moon at the same time or a baseball In his latest strip, fMRI, Randall "XKCD" Munroe nails the problems with brain imaging studies that claim to The accuracy of these via explain xkcd. Lets imagine we somehow found a way to power and fire it continuously, gave one to everyone, and pointed them all at the Moon. The analysis What If: Serious Scientific Answers to Absurd Hypothetical Questions. Browse by Author. We cant use lasers to change the colour of the moon. Earthlight, on The moon is not very reflective (with an albedo it only reflects 1/8th of the light falling on it). We made a clicker game out of it! What if you could drain all the water from the oceans? xkcd: The Real Thing. Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics supporting himself through the sale of xkcd t-shirts, prints, posters, and books. So a 5 mW laser pointer with a miliradian divergence could potentially be seen even farther away, or at least photographed. Unsurprisingly, there is a relevant XKCD for this!
Recruit 5 billion people and arm them with lasers, to see if you can light the moon! This means you're free to copy Comic Rocket is a growing index of 41,720 online comics.We link to creators' sites exactly as they're meant to be shown. To even match 100,000 lux on a screen that size, we would need a single projector capable of projecting 1 million lumens of brightness. 5. In the New York Times best-selling book from the creator of the wildly popular webcomic xkcd, Randall Munroe gives hilarious and informative answers to important questions you probably never thought to ask. The moon is not very reflective like a projector. Todays XKCD, Visual Field, is a terrific mind-bender: a series of optical experiments to try with your computers screen and a rolled-up piece of paper that demonstrate Comic strips remain the property of the author; requests for copying and printing should be directed to the author of the strip in question. Absolutely not. > >| Batteries are NOT included, because of the strict shipping policy. Peter Lipowicz XKCD has the answer here. WhatsApp.
If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Here the former roboticist tackles important topics like what would happen if everybody on Earth pointed a laser pointer at the Moon at the same time. This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License. Topic: If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Surprising answers follow. This is a very different case, shining LASERs back at the earth. Jun 21, 2013 #16 FireMyLaser Well-known member. So, in the middle of his three-hour presentation, Mr. Munroe, who is best known as the creator of the Web comic xkcd, switched gears to Star Wars .. What if you could drain all the water from the oceans?
If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Not if we use regular laser pointers. The first thing to consider is that not everyone can see the Moon at once. We could gather everyone in one spot, but we learned our lesson about that a few weeks ago. https://www.explainxkcd.com/wiki/index.php/1681:_Laser_Products In a 2002 paper, Laser Elevator: Momentum Transfer Using an Optical Resonator (available at your local school/library, possibly This is a very different case, shining LASERs back at the earth. That is, the intensity would be like a million times dimmer on the surface of the Moon. LinkedIn. The XKCD webcomics by Randall Munroe are known for their highly accurate and playful ability to satire complex math algorithms, computer languages, science and more. When one reader asks if the color of the moon would change if This is bonded to the glass lenses with a special coating that reflects certain wavelengths. Lets say a 10m x 10m projection surface or ~33ft x 33ft. In a Package Includes: 1 x Laser Pointer Pen. If every person on Earth aimed a laser pointer at the moon at the same time, would it change colour? Its not a question I think I would normally have considered, but XKCDs what if series has the full details. 400000 km away and the beam divergence is 1 milliradian then you are talking about a spot with 200 km radius. When one reader asks if the color of the moon would change if every person on Earth aimed a laser Answer (1 of 13): I suppose that you mean, Can you hit the moon with the LIGHT from a laser pointer, by which you also mean an ordinary, pocket-sized laser pointer. Such a laser beam is too weak and too small to travel through sixty What If Review By Quinn Rollins on December 15, 2014 in Books Reviews. This month's books include a look at the power of introverts, a mystery from J.J. Abrams, and a mysterious circus. One appears to gain the upper hand as he jumps on an obstacle, as the others shot goes wide. (Kids these days) building a safe laser cutter. 120 votes, 23 comments. "What if" from XKCD - If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Although denialists should be aware, science is involved and you riske being left behind. Peter Lipowicz XKCD has the answer here. An equivalent CFL (1600 lumen) can be considered roughly similar in light wattage. Girl sleeping (Sketch -- 11th grade Spanish class) Red spiders. We offer various laser pointers here. What If? Absolutely not. Category: Gun Stuff | 2 Comments. Cheaper (i.e. Peter Lipowicz; Know the quiet place Fans of xkcd ask Munroe a lot of strange questions.
IN 1989 Bill Watterson, the writer of Calvin and Hobbes, a brilliant comic strip about a six-year-old child and his stuffed tiger, denounced his industry. According to the UK Health Protection Authoritys advice on laser pointers, laser pointers should have less than 1 milliwatt of power. What if all the lightning in the world struck the same place? Photons generated from a standard flashlight can reach the moon - however, from said flashlight, as soon as they are generated they begin to disperse in a cone type form. Comic Archive. What if you could drain all the water from the oceans? So a 5 mW laser pointer with a miliradian divergence could potentially be seen even farther away, or at least photographed. Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers Home. He is famous, however, for engineering a creation of different kind: the iconic Barrel - Part 1. will be required reading for xkcd fans and anyone who loves to ponder the hypothetical.An Amazon Best Book of the Month, September 2014: What if everyone on earth aimed a laser pointer at the moon at the same time?
Even though a laser beam is very narrow, it does spread out, and by the time it reaches the moon it will be a couple of hundred meters wide. Preorder here! Comic strips remain the property of the author; requests for copying and printing should be directed to the author of the strip in The laser had arrived. Approximation: Laser pointers are 10-3 watts. coondoggie writes "Commercial grade green and red laser pointers emit energy far beyond what is safe, posing skin, eye and fire hazards.That was the conclusion of a National Institute of Standards and Technology study on the properties of handheld lasers. At least then you can play vector games on the wall. I thought about the scene Click picture to download target. June 30, 2016. the folks at XKCD took a shot at answering the question "If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color?".
Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers Home. Randall went on to write an extremely successful blog titled xkcd (not an acronym) that bore the tagline A webcomic of romance, sarcasm, math and language. Brightness of laser beam: Green > Red > Violet. If they have a lump on one side, Oct 1. So I bought the anniversary edition and I noticed there are some hidden texts on page 28-32 on the images of the moon. For as long as the laser took to gestate, once it was born the advances came rapidly. Resposta: Sim. Jun 21, 2013 #7 Stin Relevent XKCD . ** In the third season, Nanoha even Beam Spams her ''WaveMotionGun'' attack from five different direction against [[spoiler:her ''daughter'' Vivio]]. Irony. Lets say a 10m x 10m projection surface or ~33ft x 33ft. Of the many, many photons sent to the Moon in the pulse, only between 1 and 5 photons make it back down to the detector. What If? reasonably priced) laser pointers produce much worse results. The typical red laser pointer is about 5 milliwatts, and a good one has a tight enough beam to actually hit the Moonthough itd be spread out Dont forget, were right next to a gigantic fusion reaction that is the equivalent of 1,000,000,000,000 one-megaton nukes going off per second. This archive is maintained by Imran Nazar. In the comic, two people are engaging in a battle with laser guns. All laser pointers output are accurate, and the prices are affordable. This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License. This is a mini laser pointer, you can use it for cat playing, teaching, sending SOS signal. The result is spectacles that can reflect or filter out different laser wavelengths. Question: Has anyone in space seen or photographed a laser pointer from Earth? According to XKCD (citation above, the Sun Bug page) we have 0.0006 lumens for "headlight bugs". #13 - Laser Pointer. As they tumble around in a thunderstorm, they grow via water freezing onto their sides. What if you could drain all the water from the oceans? Illuminated by around 0.1W/m^2, or 5*10^11W. He delivers the classic line Any last words? and is answered with the confusing phrase Apollo retroreflectors. Question: Has anyone in space seen or photographed a An Amazon Best Book of the Month, September 2014: What if everyone on earth aimed a laser pointer at the moon at the same time? His webcomic had already started garnering 70 million hits a month by October 2007. WhatsApp. 200W of 405 445nm blue. there should be some pics of of light diffraction through a prism . What would happen if the moon went away? The eye may be able to see a single Alas, the answer is no. Part 6: So, how many laser pointers does it take to change a moon? To even match 100,000 lux on a screen that size, we would need a single projector capable of projecting 1 million lumens of
A "100W incandescent" generates about 2.2% light energy, or 2.2 Watts. In the comic, two people are engaging in a battle with laser guns. is one of my Internet must-reads, and I look forward to each new installment, and always read it with delight.-- "Cory Doctorow, New York Times bestselling author" Required reading across the world.-- "New York Times" Munroe applies reason and research to hypothetical conundrums ranging from the philosophical to the scientific (often absurd but never pseudo) that probably The Laser Elevator. Earth Moon Lagrange 2 (EML2) A region beyond the far side of the Moon where centrifugal force balances the Earth's and the Moon's gravity. Oct 1. Laser Pointer If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Randall Munroe began his career in physics working with robots at NASA's Langley Research Center. Dive through the archives or read the latest page, and Comic Rocket will keep track of where you left off. Smullin and Fiocco from MIT and Graysuk from the Crimean Astrophysical Observatory both carried out the first ranging experiments in 1962. Octobers ePostal Match is 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions comes out 9/13. Solar sails suck.