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Memory of Firenze 













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Femto Photography – Catch Light Speed in Motion

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Femtosecond (fs) is a measurement unit of time, equal to 10 -15 second or 0. 000 000 000 000 001 second.   Femto is the unit from the SI (International System of Unit) scale.   We may feel 1 second is a very short length of time in our daily life. But in science, there are even smaller measurement units out of our imagination: 1 second =1000 ms (milli second) 1 second = 1,000 000 μs (micro second) 1 second = 1 000 000 000 ns (nano second) 1 second = 1 000 000 000 000 ps (piko second) 1 second = 1 000 000 000 000 000 fs (femto second) We know light travels about 300 000 metre per second, or 300 km per second.   By using smaller measurement like femtosecond, we can work out that light travels about 300 nano metre ( or 0.000 000 3 metre) in 1 femtosecond (300 000 / 1 000 000 000). In 1964 Dr Harold Eugene ”Doc” Edgerton from MIT used a high-speed camera filmed a bullet hitting through an apple.   At a million frames per second, the camera was a...
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  Raphael, School of Athens From Khan Academy The School of Athens represents all the greatest mathematicians, philosophers and scientists from classical antiquity gathered together sharing their ideas and learning from each other. These figures all lived at different times, but here they are gathered together under one roof. Raphael,  School of Athens , 1509-1511, fresco (Stanza della Segnatura, Palazzi Pontifici, Vatican) The two thinkers in the very center, Aristotle (on the right) and Plato (on the left, pointing up) have been enormously important to Western thinking generally, and in different ways, their different philosophies were incoporated into Christianity. Raphael, detail of Plato and Aristotle,  School of Athens , 1509-1511, fresco (Stanza della Segnatura, Palazzi Pontifici, Vatican) Plato points up because in his philosophy the changing world that we see around us is just a shadow of a higher, truer reality that is eternal and unchanging (and ...
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