Discover and read the best of Twitter Threads about #lasers

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#SpaceThreatsOEWG Day 3, Session 2, exchange among Member States.

Follow live with this đŸ§” by @JessLuella_West
#France draws attention to FALSE perception that some irresponsible practices might provide more advantages than disadvantages. Must deconstruct through transparency, cooperation, and commitments such as that regarding destructive DA #ASAT tests.
Read 78 tweets
PSA: I can’t believe this needs to be said, but here goes: If you fully enclose an outdoor space, it becomes an indoor space. That’s it, that’s the tweet.
Change “Smoking” to “#COVID” and voila, you have a safe, ventilated outdoor space (borrowed from Smoke Free UK regulations that went into affect in 2007: mikoengineering.co.uk/blog/everythin
). @aoc @Ilhan @RepJimmyPanetta @KamalaHarris @BernieSanders please please spread the word.
EDIT: “safer”

You will have a safer space outdoors in the time of #COVID19.
Read 7 tweets
Right, now, on to attoscience (which combines #quantum #physics with #ultrashort #lasers).
First, I dusted off an overview slide of my thesis presentation. Attoscience studies electron motion in bound states, ionization processes, charge transfer, and similar. Image
All of this happens on the time scale of attoseconds, 10⁻Âč⁞ seconds (and sometimes femtoseconds = 10⁻Âč⁔ s), which is almost unimaginably fast. In the short intro podcast with @the_ScienceTalk, I explained the comparison with the age of our universe.
To measure such fast dynamics we need an equally as fast tool, which is laser pulses of a few femtosecond duration or shorter. Because a lot of energy is compressed in a very short time, the peak power of these pulses can reach terawatts (similar to nuclear power plants). đŸ˜Čâ˜ąïž Image
Read 8 tweets
07/02 > La révolution des ondes #térahertz bit.ly/2ZvTB5t via #CNRSLeJournal #LaMethSci Image
1999 > Le nouveau monde des ondes #térahertz bit.ly/2R29H1R via @PourlaScience #LaMethSci Image
[#Image] OĂč se situent les ondes TĂ©rahertz ? bit.ly/32Bw70p #LaMethSci Image
Read 23 tweets

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