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Jun 2, 2021 · Please help me understanding the zero-dispersion wavelength in fibers. I found this wiki-article on the topic. Accordingly: "In a single-mode optical fiber, the zero-dispersion wavelength is ...
No, the value $9.8\frac {\mathrm {m}} {\mathrm {s}^2}$ is an approximation that is only valid at or near the Earth's surface. You can go a few miles up or down and it'll still be good enough, but once you get any sign...
May 31, 2021 · Who says that steam (which I assume means water vapor) at 100 °C feels hotter than liquid water at 100 °C? I know that I can briefly reach into an oven filled with air heated to 200 °C and it wouldn't e...
May 13, 2024 · Sydney Coleman described a spinning basketball as having a tiny speed but an enormous angular momentum, in natural units.
Feb 27, 2025 · Why is the magnetic field not a conservative field? If it were conservative, which equation in the theory of electromagnetism would change/be canceled?
Jun 24, 2024 · When brakes are activated in a vehicle it decelerates. Analysing its motion, there can be only one force that can be responsible for it: the friction between the car and the ground. So does braking
Apr 16, 2024 · My class had to do an online simulation about the different free fall times of objects, both on Earth and in a vacuum. In it, I noticed that in an atmosphere, objects with greater mass fell faster ...
Sep 15, 2017 · Yes, increasing the -ve charge increases the force of attraction, requiring more work to separate the two charges. The potential energy becomes more -ve because more work is required to separate them. Y...
Aug 26, 2025 · This question is similar to: Why isn't average speed defined as the magnitude of average velocity?. If you believe it’s different, please edit the question, make it clear how it’s different and/or how t...
Jan 4, 2025 · Homework-like questions and check-my-work questions are considered off-topic here, particularly when asking about specific computations instead of underlying physics concepts. Homework questions can be o...
