Oct 9, 2020 · The answer is given in the third remark at the end of Section 3 of my paper "Demonstration and resolution of the Gibbs paradox of the first kind" Eur. J. Phys. 35 (2014) 015023 (freely available at arXiv).

Mar 8, 2021 · $\begingroup$ We don't know how to solve SU(n) QCD neither for finite n, nor in the infinite limit, so we cannot say how good large-n is for n=5. We don't know what either of those theories look like, really. But, hopefully, n=3 is already "large". $\endgroup$ –

Jan 10, 2024 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Jan 20, 2022 · The quality of an approximation being "good" is not binary. There is no point at which an approximation switches from being good to being bad.

Sep 5, 2020 · Whereas for Young's fringes the angles are small enough to use the approximation, $$\sin \theta \approx \theta \approx \tan \theta=\frac xL,$$ for the grating the angles are too large for the approximation to be applicable.

The symbol $\Delta$ refers to a finite variation or change of a quantity – by finite, I mean one that is not infinitely small. The symbols $\mathrm{d}$ and $\delta$ refer to infinitesimal variations of numerators and denominators of derivatives.

Sep 3, 2017 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their knowledge, and build their careers.

Mar 1, 2024 · (D) The deflection angle depends only on (𝑛 2 − 𝑛 1) and not on the individual values of 𝑛 1 and 𝑛 2. As per the official answer key correct answer is 2 and 4, but I am unable to understand that why light will bend if angle of incidence is zero then as per snell's law angle of refraction must be zero?

Dec 31, 2015 · It's an integral over a closed line (e.g. a circle), see line integral.. In particular, it is used in complex analysis for contour integrals (i.e closed lines on a complex plane), see e.g. example pointed out by Lubos.

Dec 5, 2014 · Whenever light (or any wave in general) goes from one medium to another, some of the energy of the wave is 'reflected' back through the first medium (at the same angle as the incident wave) and some of the energy (may be) refracted (bent) through the second medium.