Dick Grune

dickgrune.com

More photos: Lotte, Pohang, Korea (2017) , Ramparts of Zwolle, with my sister Muriël (2018) , Japanese market, Amstelveen, with my daughter Ilana (2018) .

Popular posts: 1
Total points: 182
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Visit dickgrune.com → On Hacker News Mar 2014 – Mar 2014

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How a Light Saber Works

2014182 points118 comments Science & Space details

[ Metanote: This explanation arose out of a lunch-time discussion with a colleague who claimed a light saber could not exist since the light beam it emits could not just stop in mid-air after 75 cm. I thank this colleague for the challenge. ]