Hello everyone, I’m currently in my senior year majoring in Electrical Engineering. I wanted to know how can I get a job or what type of jobs in optics/photonics and laser science that takes in people with bachelors? I’m planning to do grad school, but I’m going to do that later in a year or two after graduation. I do have research experience in laser plasma diagnostics and never had an internship before in the industry. I wanted to apply for PhD programs, but my gpa is low for that right now and I want to use my experience and solid LOR and SOP to make it up for it. I’ve had a hard time finding roles that pay decent for optical test engineer roles that doesn’t require a PhD or 5+ years of experience. Any options that I should look into? I’m geographically from Minnesota, so finding a photonics jobs here is very hard, I’m more than open to relocate (preferably in the coast (northeast, pacific or mountains).

So… I’m not a physicist or physics student but I do nerd out on it a little bit. Forgive me if this is a dumb question or if my terminology isn’t right, but I’ve always wondered.

If my understanding of relativity is correct, the perception of time is relative to the motion of the observer, then what would time as it relates to things like the procession of the observable universe and celestial bodies, (and anything else I can’t think of or don’t know about) look like if we were truly stationary in the universe?

Like hypothetically, if our solar system, and entire galaxy were not moving through space.

Is our movement through space fast enough to make a difference? If we had (hypothetically) always been stationary, for billions upon billions of years, how different would the universe appear to be, other than the maybe obvious, like other galaxies and stars would be moving but we wouldn’t, our galaxy would’ve probably suffered a collision at some point. Stuff like that not considered. Only our understanding and perception of time, and the apparent behavior of the universe around us?

I get how mathematically divergence of curl and curl of divergence are 0 but why doesn't curl of a vector field diverge and why does gradient of a vector field not curl/swirl.

Hey guys!

I am finding it a bit hard to understand how these work together.

Particularly, i cannot process how something rotating very slowly can still have points on it surface go at 1640kmph (earth).

Like if an object translated at that speed it would look insane , but I can only imagine earth rotating very slow which makes it hard for me to believe that we are going at 1640 kmph.

I'm looking for explanations or something that could make it easier for me to grasp this

I realize that an object rotating in space is forcing charged particles to accelerate and thus generates electromagnetic waves, even if the loss of momentum is miniscule.

Do rotating objects, no matter how small of relatively little mass, generate gravitational waves? Or are there principles that limit the energy that can be carried away by gravity, the way electromagnetic waves are quantized?

Hello, I am looking for an experienced person (and not an AI) to help me understand a phenomenon of second harmonic generation (GSH) by frequency doubling. My pump laser has unstable polarisation and, with an injected power of 9 W, I only get 0.8 W of converted power. However, with the same assembly but a different pump laser, I get 1.5W in a single pass. I am not sure of the impact of polarisation on this result. I measured a polarisation extinction rate (PER) of 14 dB, but as it is unstable, it is difficult to determine its influence. If anyone has any advice, a theoretical explanation would be welcome. 🙏

Hi everyone,

I am a PhD student doing both experiments and computational physics ( mostly fluid dynamicswith Boltzmann equations) and leaning towards more computational day by day.

Currently I am using Julia, I find it pretty fast and easy to use.

Do you think switching to C or C++ will be a benefit? I am asking from a research, but also emplyment in industry point of view.

I discussed with many people, mostly from the DFT area, and most of them told me that Julia slowly will take up the lead for HPC code.

What.s your opinion on this?