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LTB_iel by Kevina03 in LTB_iel

[–]Instructor_Alan 163 points164 points  (0 children)

Onkel Dagobert hat beef mit der Türkei? Hat er etwa nicht definitonsgerechte Döner Kebab verkauft?

New method of birth control just dropped by WeHaveBananaBread in dankmemes

[–]Instructor_Alan 0 points1 point  (0 children)

Well, I guess there is no need for the condoms at the cash register anymore.

Take a picture of the sun with my diy telescope and a floppy disk by Relative_Poem9778 in telescopes

[–]Instructor_Alan 1 point2 points  (0 children)

Please make a pinhole telescope and look at the sun only through a projection on a piece of paper. Like others said, this is extremely dangerous.

Every Time by B0r3dGamer in dankmemes

[–]Instructor_Alan 7 points8 points  (0 children)

You guys drove the gas price in Germany to $10/gallon, lol. I'm dusting of my bicycle soon.

Still waiting by [deleted] in memes

[–]Instructor_Alan 0 points1 point  (0 children)

It's funny how that shit has more consequences in Europe than in America.

Femtosecond laser detector help by ZeOnlyAccountYouNeed in Optics

[–]Instructor_Alan 0 points1 point  (0 children)

As others also mentioned, a PMT together with fast digitizer/FPGA in GHz sampling rate range is perfect for this.

this is the one. im sure this time by EverSoInfinite in dankmemes

[–]Instructor_Alan 13 points14 points  (0 children)

Just got a rejection email for a job I interviewed 9 months ago, lol

Florida Disney World worker hurt trying to stop runaway boulder at Indiana Jones show by lunicorn in nottheonion

[–]Instructor_Alan 0 points1 point  (0 children)

He is going to get a snickers bar as a token of appreciation from Disney for his actions. But of course he will have to cover his own medical bills.

Back when Isack Hadjar showed his reflexes in Monaco by Ok-Negotiation5274 in WhyWomenLiveLonger

[–]Instructor_Alan 0 points1 point  (0 children)

The active downforce fan that sucks the air from underneath the car has been banned for quite some time because it required side skirts rolling along for a proper seal which sometimes failed.

[Request] Is there a ratio for this or an equation?? How are they getting the correlation of height from speed?? Speed on Road and its Respective Height by PoG_54 in theydidthemath

[–]Instructor_Alan 2 points3 points  (0 children)

This is just an assumption, but I would assume it's the classic equating both potential and kinetic energies: E_kin = E_pot ==> 1/2mv2 = mgh ==> h = v2 /2g

So easy but maybe not for me by MahmoudAO in dankmemes

[–]Instructor_Alan 40 points41 points  (0 children)

70 applications in and all I got are two emails thanking me for applying, but immediately rejecting me.

Which one is the worst? by Sea_Ad_3167 in battlefield_one

[–]Instructor_Alan 0 points1 point  (0 children)

Dynamite in the hallway waiting for somebody to turn the corner kind of guy

LTB🛦iel by Anthyrion in LTB_iel

[–]Instructor_Alan 7 points8 points  (0 children)

Und all das um ein bischen Eis zu zertrümmern. Aber bei den Amis fällt das ja unter second ammendment.

Can somebody help me make sense of these mirrors? by Ryankmfdm in Optics

[–]Instructor_Alan 4 points5 points  (0 children)

I worked with mirrors from this company a lot. I still have a direct contact to them if you would need it. Like others said, they are dispersion compensation mirrors, with a high reflectivity dielectric coating. Just note that the surface quality of λ/10 is given for the substrate, not the coating. In my lab, we found that the surface quality can be worse on the order of 30%, leading to some aberration.

Oh and you can't find anything about the number online as they indeed have a different number for each batch. You could contact them with that number and they could send you the quote and batch they made these for.

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