This artist (Marcello Barenghi) is absolutely awesome.
Good one. This explains an exam question (Optics in third year) I had many years ago: calculate at what distance you may be able to tell that the light you see coming is not a motorcycle (a single headlight) but a car (two headlights). [Of course everything is related to the concept of optical resolution, and it was actually a pretty easy problem]. I remember that I was wrong by an order of magnitude in wavelength, and the result was obviously (and patently) wrong … the worst is that I tried to justify myself (I knew it was well done, the physics was correct… but I was stuck with the damn order of magnitude) and further suspend, I ended up doing pretty ridiculous. Shit happens!
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StackExchange has a thread on this specific topic: Could Legolas actually see that far?
To commemorate the World Music Day. If you are surprised with this video maybe you should take a look at these links:
- How does a guitar work? and Strings, standing waves and harmonics (School of Physics at UNSW, Sydney, Australia)
- Acoustic Guitar (HyperPhysics)
- Physics, guitars and pitch harmonics (Skulls in the Stars)
- String, Tension and tunning (noyceguitars.com)
- Guitar Harmonics (Wikipedia)
- WHY do harmonics happen? (StackExchange)
(Nodes of natural harmonics)
The smartass side of Stephen Hawking in Last Week Tonight with John Oliver:
J.O. - You stated that could be an infinite number of parallel universes. Does that mean that there was a universe out there where I’m smarter than you?
S.H. - Yes, and also a universe where you’re funny.