Klaynos

It is indeed. They use some really cool correlation methods...

Just to add even more... If it's a pulse you can use time of arrival differences between multiple sites to do a triangulation. We really do need more information.

No... not a single term. But there are professional bodies for which levels of membership may have certain criteria associated. For example I am a member of the institute of physics. To get the level of member I needed a supporter and to provide evidence of working at a given level as a professional phycisist for a given amount of time. Many of these bodies provide chartership as well as membership grades, e.g. chartered phycisist or chartered engineer.

Arduino does make home labs much more accessible. You need to find some way to rule out the vacuum pump and associated electrics from being the cause of the magnetic fields. Which is far far more likely than what you're proposing. But I have to commend you for actually doing an experiment and improving it based on feedback. Experimental physics isn't easy, I would anticipate a fair few iterations of the experiment before you've rulled out most of the obvious interferers.

That's pretty much exactly what I was thinking. Arduino is great for things like this. With esp8266 and ittt you can make an Alexa controlled remote (other home automation services exist).

Ah yeah. I expect you're right. You can even get (or at least build) ones that you point other remote controls at and can remember what they receive.

I don't know, remote controls were around before the advent of small cheap microprocessors. If the non microprocrssor solution works, is reliable and cheap I suspect it's still quite common. Probably something clever with cheap timing chips. I'm not sure if the question was about the modulation of the actual photon generation?

Maths, all the maths at highschool level. Photonics rather than particle physics but of my contemporary PhD students I would suggest that 1 in 5 is probably a fair value for the number of people who stay in academia. I don't work in l anything close to my PhD subject but I do collaborate with some particle phycisists. I wouldn't get too caught up in the difference between a theoretical phycisists and an experimentalist. It's rare that the line is very strong in my experience. Although I almost always refer to myself as an experimental phycisist, at least two of my papers are pretty much theoretical model development with some experiments to test it.

The IR LED?

It'd be helpful to know where you want to study (country) and your end goal

Modern changes to the story. He was really happy for the chance.

That reads like wishful thinking and is subjective. Child sacrifice happened almost universally for probably thousands of years. There's even some who argue that Abraham not sacrificing his son but using an animal instead is a more modern change from him actually sacrificing his child. God? That's not evidence, just more subjective wishful thinking.

I don't think they do. Humans have conducted child sacrifice in the past. They didn't think it evil.

If it was a falcon and not a hawk then it's a different type of bird. Maybe he was trying to give you a positive negative answer. Or... It it's just a combination of a very very big sample size and confirmation bias.

Can you start by carefully and unambiguously defining what you mean by "real" and "evil"?

RTYBRBTYBRT, what's the point you're trying to get at here? That's not an either or question. Both can be true.

That will always be the case. You will not catch fish outside of where you cast your net. You could try searching all of the larger databases, Google scholar, web of science, Google books etc... But there is still the chance of missing things. The easiest way is probably by asking the researcher. Although I've been known to forget my own publications. Especially the less formal ones (e.g. conference proceedings).

Where in Somerset is this? (I didn't realise you were that close) I'm wondering if the vertical velocity from the Weir might have caused a very gradual undercut. Which possibly together with the recent very dry warm spell causing some movement above the low water line has caused the drop. The fault in the wall following some weak point, possibly a repair or showing how it was built in sections?

I see, cool. Yeah it does. Also probably too floody for this application. 433MHz modules are definitely worth a look. You can pretty much control the range with antenna length too.

I used hc-05 as an example. Yeah torch tail switches are normally not too big. What host are you using? You could look at 433MHz transmitter receiver pairs. That plus an attiny85 surface mount on a bespoke PCB might just get down to the size required. I imagine the few lights that do this do it by having some more space and something on the mcpcb. What led are you using in your torch? The Samsung LH351D looks pretty interesting at the moment.

Against the rules, I'm not sure depends what you say. Weird, definitely. Really your whole thread reads a bit off to me. A bit like a youngish guy who is upset that he isn't getting what he wants.

You'd need a Bluetooth module and probably a microprocessor to interpret the info and then a transistor as the switch. Outside pairing a hc-05 uses about 8mA you could run that at the voltage of the cr2032 along with say an Arduino pro micro 3.3V at around 5mA with no modifications. Cr2032 are typically in the region 250mAh, if we call it 260 mAh for simplicity, 260/13 is 20 hours. You can get the Arduino side down quite a bit but not sure how much better more expensive Bluetooth 4 devices will get you.

! Moderator Note OP clearly doesn't want to discuss science so thread closed. You may not reintroduce this topic in our forum. If you disagree with this decision you may report this post for other mods to review.

No. Photonics.

My PhD was in the interaction of electromagnetic radiation with matter. It's still a pretty big area of research.