4 ms·
It's amazing what we don't know about things sitting just a few light seconds away at most, too, such as the depths of the oceans or the spiders in my backyard.
by code_duck 15y ago
It's amazing what we don't know about things sitting just a few light seconds away at most, too, such as the depths of the oceans or the spiders in my backyard.
I think they're working on the 'bases on other planetary bodies' backup plan, but it will be a few years.
- burke 15y agoJust FYI, The circumference of earth is roughly 4 * 10^7 metres, and the speed of light is 3 * 10^8 m/s, so light can actually circle the globe almost 7.5 times per second. The depths of the oceans are just a few milliseconds away (40ms -ish?).
- code_duck 15y agoI figured it was something like that. Certainly explains why my ping to London is under 100 ms, right?
- burke 15y agoYup. My Telecommunications prof back in University told us you can approximate the speed of a network as 2c/3, so that sounds right on the button.
- mseebach 15y agohttp://www.wolframalpha.com/input/?i=depth+of+challenger+deep+in+meters http://www.wolframalpha.com/input/?i=depth+of+challenger+dee... http://www.wolframalpha.com/input/?i=time+for+light+to+travel+11000+meters http://www.wolframalpha.com/input/?i=time+for+light+to+trave... 40 µs, not ms. (off topic.. can anyone get wolfram alpha to answer that in one query?)