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[personal profile] quizcustodiet
Living in Headington can be vaguely annoying - or at least, is a major change from living in John's, right in the center of Oxford. I'm still not quite used to leaving the house at 9 am and not returning until 12 or 13 hours later every time I want to go and do an activity after a day in the lab.

It does lead to some genuine Oxford-style randomness, though. Last night I was staying in Oxford for the OTC and my first session of Sul-Ki-Do, a composite of various Korean martial arts and self-defence techniques. Both of these were entertaining, but after helping to move a howitzer by hand at one and spending an hour and a half exercising in the other, when I reached Headington Hill on the way home I decided it was time to walk. So as I'm about half way up the hill, a cyclist overtakes me.

"Better you than me, mate," I offer.

"Is that you, Ben?" says.... my supervisor!

Cue 10 minutes or so of awkward conversation - we've only known each other properly for a week or two and, hell, we're both physicists - as we trudge to the top of the hill then cycle into Headington. The whole thing was more than slightly surreal.

In news to date, I've spent most of today trying to align a very small hole with an invisible laser. If the Greek Gods had known more science, they'd have gone straight for this in Hades and skipped out on rolling rocks up hills.

Date: 2004-10-13 05:16 pm (UTC)
From: [identity profile] borogove.livejournal.com
In news to date, I've spent most of today trying to align a very small hole with an invisible laser.

Forgive the silly question, but how do you go about aligning a hole with an invisible laser?

Date: 2004-10-14 12:36 am (UTC)
From: [identity profile] quizcustodet.livejournal.com
We use an intermediate step. The laser has a wavelength of 830 nano-metres; in order to see where it is, we use a flourescent card. This absorbs normal visible light and uses the energy of that light to excite electrons. These excited electrons decay when they're struck by one of the infra-red photons, releasing visible light.

That's our method - you can also get cameras that operate on a slightly different principle. Amusingly enough, one of my friends has discovered that the camera on his mobile phone can see lasers in the infra-red!

Date: 2004-10-14 06:54 am (UTC)
From: [identity profile] borogove.livejournal.com
Thank you for the explanation. That does seem to be rather challenging. Good luck with it!

Date: 2004-10-30 03:40 pm (UTC)
From: [identity profile] rachuk.livejournal.com
That experiment sounds like something Dr Evil would conceive of.

"Bwhuaha, now as part of my master plan. I will align this invisible laz-yer (on the head of a shark) with a very, very small hole. Now... where did I put the lay-zer?"

Hi, btw, Borogove told me about your LJ. :)

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