Skip to main content

Is there a speed of darkness?

Is there a speed of darkness?

A black hole in space.
If light can travel and we're able to measure it, what then becomes of the speed of darkness?
MarcelC/Thinkstock
No spreads. No commissions. Start your trader way here!
Researcher Discounts Small quantities Fast Shipment
Improve Your Computer Skills, Sign Up Now For Free Online Courses
Scientists have long established the speed of light at just shy of 300,000,000 meters per second, or around 186,000 miles per second [source: NASA]. While it might seem logical that the existence of a speed of light means there must be a way to determine the speed of darkness, this isn't necessarily true. While it may be possible to define the speed of darkness, this determination is heavily dependent on just how you define the dark.
Strictly speaking, dark is simply the absence of light, and thus has no speed at all, according to noted astrophysicistNeil deGrasse Tyson. In his opinion, the idea of a speed of darkness is no more than a poetic metaphor, but has no place in legitimate scientific discussion [source:StarTalk].
If you expand the concept of dark, however, it may appear that the dark has a speed all its own. Consider a dark spot in a beam of light, which might be created by placing a piece of cloth or other object over part of the light source. While this dark spot might not meet strict criteria for total darkness, it travels at the same speed as the rest of the non-obstructed light [source: University of Illinois]. This same speed of darkness holds true if you equate darkness to how long it takes for the light to go away when the power is switched off -- again, the speed of dark in this case is equal to the speed of light.
Widen the interpretation of darkness a bit further, and consider the speed of dark matter. This mysterious energy makes up 80 percent of all matter in the universe. In a 2013 study, scientists determined that dark matter should have a speed of 54 meters per second, or 177 feet -- slow compared to the speed of light [source: Armendariz-Picon and Neelakanta]. Of course, dark matter velocity is theoretical at this point, as this matter has largely stopped moving, preferring to form haloes around galaxies throughout the universe. The 54 meters per second figure estimated its speed when the universe was first forming, extrapolated to how fast the dark matter could travel today if it were still in motion [source: Woo].
Finally, consider what would happen if you extend the definition of darkness to include black holes, which are devoid of light. In 2013, researchers determined that one massive black hole measuring more than 2 million miles (3.2 million kilometers) across was spinning at around 84 percent of the speed of light [source:Fazekas].

Comments

Popular posts from this blog

Hidden Wiki

Welcome to The Hidden WikiNew hidden wiki url 2015 http://zqktlwi4fecvo6ri.onion Add it to bookmarks and spread it!!!
Editor's picks Bored? Pick a random page from the article index and replace one of these slots with it.
The Matrix - Very nice to read. How to Exit the Matrix - Learn how to Protect yourself and your rights, online and off. Verifying PGP signatures - A short and simple how-to guide. In Praise Of Hawala - Anonymous informal value transfer system. Volunteer Here are five different things that you can help us out with.
Plunder other hidden service lists for links and place them here! File the SnapBBSIndex links wherever they go. Set external links to HTTPS where available, good certificate, and same content. Care to start recording onionland's history? Check out Onionland's Museum Perform Dead Services Duties. Introduction PointsAhmia.fi - Clearnet search engine for Tor Hidden Services (allows you to add new sites to its database). DuckDuckGo - A Hidden S…

fix idm integration on chrome

Chrome Browser IntegrationI do not see IDM extension in Chrome extensions list. How can I install it? 
How to configure IDM extension for Chrome?Please note that all IDM extensions that can be found in Google Store are fake and should not be used. You need to install IDM extension manually from IDM installation folder. Read in step 2 how to do it.

1. Please update IDM to the latest version by using "IDM Help->Check for updates..." menu item

2. I don't see "IDM Integration module" extension in the list of extensions in Chrome. How can I install it?

Press on Chrome menu (arrow 1 on the image), select "Settings" menu item (arrow 2 on the image) and then select "Extensions" tab (arrow 3 on the image). After this open IDM installation folder ("C:\Program Files (x86)\Internet Download Manager" by default, arrow 4 on the image) and drag and drop "IDMGCExt.crx" (arrow 5 on the image) file into "Extensions" page opened in…

Explainer: The nico-teen brain

Explainer: The nico-teen brain The adolescent brain is especially vulnerable to the addictive effects of nicotine BY  TERESA SHIPLEY FELDHAUSEN 7:00AM, AUGUST 19, 2015 Nicotine (black triangle towards center left) tricks the nerve cell (neuron) into sending a message to release more dopamine (yellow dots). Those molecules enter the space (synapse) between one nerve cell and the next. When they get picked up by neighboring cells, this gives users a feel-good high. It also creates the risk of addiction and other health problems.  EMail Print Twitter Facebook Reddit Google+ NATIONAL INSTITUTE ON DRUG ABUSE, ADAPTED BY J. HIRSHFELD Nicotine is the addictive chemical in tobacco smoke and e-cigarette vapors. And doctors say the teenage brain is no place for it to end up. Nicotine can reach the brain within seven seconds of puffing on a cigar, hookah, cigarette or electronic cigarette.
The area of the brain responsible for emotions and controlling our wild impulses is known as the prefrontal c…