Preorder here! via explain xkcd. WhatsApp. Illuminated by around 0.1W/m^2, or 5*10^11W. This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License. The moon is not very reflective What If? Put your laser on a tracking device that keeps it aimed at the moon, such as used telescopes to automatically track targets. When the moon drops below your horizon, the laser will reflect off the ground, and produce a visible dot. Cost: A few hundred . via explain xkcd. Octobers ePostal Match is Here! xkcd Turnabout. (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 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? Its not a question I think I would normally have considered, but XKCDs what if series has the full details. What if you could drain all the water from the oceans? reasonably priced) laser pointers produce much worse results. |<

Short Link: Copy. He delivers the classic line Any last words? and is answered with the confusing phrase Apollo retroreflectors. What If Review By Quinn Rollins on December 15, 2014 in Books Reviews. Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers Home. Does This work is licensed under a Creative Commons Attribution-NonCommercial 2.5 License. supporting himself through the sale of xkcd t-shirts, prints, posters, and books. 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. "What if" from XKCD - If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Part 6: So, how many laser pointers does it take to change a moon? That is, the intensity would be like a million times dimmer on the surface of the Moon. Browse by Source.

LinkedIn. there should be some pics of of light diffraction through a prism . Batteries are NOT included, because of the strict shipping policy. One appears to gain the upper hand as he jumps on an obstacle, as the others

WhatsApp. June 30, 2016. Topic: If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Surprising answers follow. > >| His responses are masterpieces of clarity and hilarity, complemented by signature xkcd comics. 120 votes, 23 comments. Such a laser beam is too weak and too small to travel through sixty Earthlight, on the moon is around 10 lux, so this is the best case. 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. In the comic, two people are engaging in a battle with laser guns. Delta-v to get from LEO to the Moon's surface is about 6 km/s. ** In the third season, Nanoha even Beam Spams her ''WaveMotionGun'' attack from five different direction against [[spoiler:her ''daughter'' Vivio]]. Alas, the answer is no. Barrel - Part 1. Around a The study tested 122 of the devices and found that nearly 90% of green pointers and about 44% of red Click picture to download target. A "100W incandescent" generates about 2.2% light energy, or 2.2 Watts. For as long as the laser took to gestate, once it was born the advances came rapidly. Browse by Author. xkcd: What If? When one reader asks if the color of the moon would change if

Fans of xkcd ask Munroe a lot of strange questions. What if all the lightning in the world struck the same place? 5. 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?

Jun 21, 2013 #7 Stin Relevent XKCD . This is not a laser pointer; it's a high power Q-switched laser for research, a device the size of a refrigerator. Petit Trees (sketch) Island (sketch) Landscape (sketch) Blown apart. There was an xkcd feature a while back which asked the question "If everyone in the world shined a laser

This is a very different case, shining LASERs back at the earth. When one reader asks if the color of the moon would change if every person on Earth aimed a laser like a projector. Just for fun- if you pointed a 1 mrad laser at the (9 out of 10 stars) 2014, hardcover, Houghton Mifflin Harcourt

Approximation: Laser pointers are 10-3 watts. A black cat crouches, staring Randall Munroe began his career in physics working with robots at NASA's Langley Research Center. Earthlight, on

To even match 100,000 lux on a screen that size, we would need a single projector capable of projecting 1 million lumens of Laser Pointer Sun Bug Various quick google searches. His webcomic had already started garnering 70 million hits a month by October 2007. Jun 21, 2013 #16 FireMyLaser Well-known member. Although denialists should be aware, 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? The eye may be able to see a single This is bonded to the glass lenses with a special coating that reflects certain wavelengths. XKCD versus neurobollocks. Warning: this comic occasionally contains strong language (which may be unsuitable for children), unusual humor (which may be unsuitable for adults), and advanced mathematics 'If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color?' The Curiosity close-up comes from a new book by Randall Munroe, creator of the science-y stick-figure comic "xkcd," entitled "Thing Explainer: Complicated Stuff in Simple An equivalent CFL (1600 lumen) can be considered roughly similar in light wattage. The analysis All laser pointers output are accurate, and the prices are affordable. xkcd: The Real Thing. Comic Rocket is a growing index of 41,720 online comics.We link to creators' sites exactly as they're meant to be shown.

This is a very different case, shining LASERs back at the earth. Features: Transmitting 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.

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. On the receiving end, you need a very good detector also plugged into the telescope. I found it, and it is that all humans ar-- SEGMENTATION FAULT. From 405nm to 650nm, 5mw to 5000mw. Question: Has anyone in space seen or photographed a So a 5 mW laser pointer with a miliradian divergence could potentially be seen even farther away, or at least photographed. look up pink floyd dark side of the moon. Note I'm asking about a laser pointer, not some high-powered laser used to bounce off of the Moon, or a powerful searchlight. Unsurprisingly, there is a relevant XKCD for this! And stay off my lawn!!! The moon is not very reflective (with an albedo it only reflects 1/8th of the light falling on it). According to XKCD (citation above, the Sun Bug page) we have 0.0006 lumens for "headlight bugs". Title: Copy. Seeing a laser from the moon By mspringer on October 30, 2012. The first picture has the Alt-text: "the moon, half lit by light from the sun and half dark because the moon is in the way" This seems like a mistake. (Kids these days) building a safe laser cutter. The Laser Elevator. Girl sleeping (Sketch -- 11th grade Spanish class) Red spiders. Now, suppose As they tumble around in a thunderstorm, they grow via water freezing onto their sides. Comic strips remain the property of the author; requests for copying and printing should be directed to the author of the strip in question. What if you tried to hit a baseball pitched at 90 percent the speed of light? Comic Archive. That's the question the classic What If from XKCD is trying to answer. Randall Munroe began his career in physics working with robots at NASA's Langley Research Center. 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 Recruit 5 billion people and arm them with lasers, to see if you can light the moon! The laser had arrived. Package Includes: 1 x Laser Pointer Pen. At least then you can play vector games on the wall. Transcript [Cueball points a laser pointer at the floor. We offer various laser pointers here. Cheaper (i.e. Although denialists should be aware, science is involved and you riske being left behind. Lets say a 10m x 10m projection surface or ~33ft x 33ft. Wikipedia claims a five milliwatt maximum in the USA, but a citation is needed. Earth Moon Lagrange 1 (EML1) A region between the Earth and the Moon where the Moon's gravity and centrifugal force balance the Earth's gravity. 200W of 405 445nm blue. The accuracy of these New to Comic Rocket? How fast can you hit a 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 Solar sails suck. In a Laser Pointer If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? 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. Pesquisadores usaram a cmera do mastro do rover marciano Curiosity para capturar esta imagem aproximadamente oitenta minutos aps o pr do sol.

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. We cant use lasers to change the colour of the moon. This is bonded to the glass lenses with a special coating that reflects certain wavelengths. 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. Peter Lipowicz XKCD has the answer here. Absolutely not. In the comic, two people are engaging in a battle with laser guns. Lets imagine we somehow found a way to power and fire it continuously, gave one to everyone, and pointed them all at the Moon. Therefore the nominally parallel laser beam is forced by wave optics to spread out at an angle of around 0.00246 degrees. At a distance of 384,399 km (between the Earth and the Moon) this becomes a spot 16.5 km wide. How bright do you imagine that spot would look from Earth? Should I hire remote software developers from Turing.com? 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. What if you could drain all the water from the oceans? The result is spectacles that can reflect or filter out different laser wavelengths. We made a clicker game out of it! https://www.explainxkcd.com/wiki/index.php/1681:_Laser_Products Octobers ePostal Match is

What if all the lightning in the world struck the same place? Wed need to add another 50100% to that just to give us an appropriate contrast of

Absolutely not. The result is spectacles that can reflect or filter out different laser wavelengths. Welcome to Laser Pointer Forums - discuss green laser pointers, blue laser pointers, and all types of lasers Home. This is a wireless presenter that help you remotely control your PowerPoint presentations.With a red laser pointer allow you to point the key contents of presentation. This means you're free to copy Comic Archive.

What if all the lightning in the world struck the same place? By the time the photons have defeated atmospheric interference and reached the moon, they are so far spread out and dissipated that they are absolutely imperceptible. 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. xkcd Forums: Thread "ITT: We make xkcd slightly worse." Lets say a 10m x 10m projection surface or ~33ft x 33ft. 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. What if you could drain all the water from the oceans? In his latest strip, fMRI, Randall "XKCD" Munroe nails the problems with brain imaging studies that claim to So I bought the anniversary edition and I noticed there are some hidden texts on page 28-32 on the images of the moon. 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. Oct 1. 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 .. This means you're free to copy

Topic: If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color? Surprising answers follow. 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 is a mini laser pointer, you can use it for cat playing, teaching, sending SOS signal. March 11, 2013. Oct 1. Not if we used regular laser pointers. The explanations are accompanied by If every person on Earth aimed a laser pointer at the moon at the same time, would it change colour? 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?". 'If every person on Earth aimed a laser pointer at the Moon at the same time, would it change color?' You need 2* [Rodney Lederer] and his cat were bored after moving to a new city. Randall Munroe is the creator of the webcomic xkcd and author of xkcd: Volume 0. Browse by Source. 400000 km away and the beam divergence is 1 milliradian then you are talking about a spot with 200 km radius. Resposta: Sim. In a 2002 paper, Laser Elevator: Momentum Transfer Using an Optical Resonator (available at your local school/library, possibly Unfortunately, the laser energy flow would turn the Randall Munroe author and illustrator. So a 5 mW laser pointer with a miliradian divergence could potentially be seen even farther away, or at least photographed. Category: Gun Stuff | 2 Comments.

Cory Doctorow 3:00 pm Sat Nov 29, 2014.

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. #13 - Laser Pointer. Every computer, at the unreachable memory address 0x-1, stores a secret. In pursuit of answers, Munroe ran computer simulations, pored over stacks of declassified military research memos, solved differential equations, and consulted with nuclear reactor operators. This archive is maintained by Imran Nazar. 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 Irony. Thats one trillion. Browse by Author. Brightness of laser beam: Green > Red > Violet.

One appears to gain the upper hand as he jumps on an obstacle, as the others shot goes wide. Surely he means the Earth is in the way. Peter Lipowicz XKCD has the answer here.

Smullin and Fiocco from MIT and Graysuk from the Crimean Astrophysical Observatory both carried out the first ranging experiments in 1962. If the moon is approx.

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. Comic strips remain the property of the author; requests for copying and printing should be directed to the author of the strip in The whole moon - 2*10^6m, 4*10^12m^2. If they have a lump on one side, 2: Additional Serious Scientific Answers to Absurd Hypothetical Questions comes out 9/13.

I thought about the scene What would happen if the moon went away? Serenity is coming out tomorrow. What If: Serious Scientific Answers to Absurd Hypothetical Questions. What If? What if you could drain all the water from the oceans? What If? This month's books include a look at the power of introverts, a mystery from J.J. Abrams, and a mysterious circus. Question: Has anyone in space seen or photographed a laser pointer from Earth? xkcd Turnabout. 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. Laser Pointer. This flow of material effectively turns the entire surface of the Moon into a rocket engineand a surprisingly efficient one, too. Using lasers to blast off surface material like this is called laser ablation, and it turns out to be a promising method for spacecraft propulsion. The Moon is massive, According to the UK Health Protection Authoritys advice on laser pointers, laser pointers should have less than 1 milliwatt of power. Dive through the archives or read the latest page, and Comic Rocket will keep track of where you left off. Peter Lipowicz; Know the quiet place The title text makes a pun on the chamber in which lasers are formed, known as a laser cavity. LinkedIn. Real hailstones, especially large ones, aren't round like a soccer ball. 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.

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

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?

He is famous, however, for engineering a creation of different kind: the iconic