Swans on Tea
Physics, tech and humor.
Swans on Tea's Latest Posts
Having Fun with the Equation of Time For most of history, the daily passage of time was denoted by the Sun. Solar Noon occurs when the Sun stands at its highest elevation (also known as its altitude) above the local horizon when it transits the north-south meridian. The trouble is, the passage apparent solar time [...]
Making Optical Waveguides Out of Thin Air The filaments are created when pulses from a 10 Hz Ti:sapphire laser collapse the air into a narrow filament, increasing the refractive index of air in the center of the beam. The filaments heat the air as they travel, causing it to expand, and leave behind an air [...]
Analysis of this and more over at Bad Astronomy.
I saw, via twitter, so links to a story that seems to be a repeat from a few months ago: about a bra (dubbed SHE) that delivers a jolt to would-be attackers. The problem with a majority of them: they claim the shock is 3,800 kV (kilovolts). That’s curious jargon, to use that number and [...]
11 Ways Women See STEM as a 4-Letter Word 4. Stemming Tide of Elderly Men Ask a child to draw a scientist and they likely draw an old man with crazy white hair. STEM has a persistent image problem where girls don’t see themselves reflected in that image. Related: Girls Love Science. We Tell Them [...]
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