Recent content by hongseok

Thank you everyone. As you said, it is not a book written in English. After referring to other threads, I think I misunderstood the context of the book. Thank you for answering my inexperienced questions with sincerity.

What does it mean to say that Planck's constant is an energy oscillator composed of imaginary and real numbers? This is an expression I saw in a book.

Yes, I wanted to talk about electric fields. Sorry

How is there a uniform electric field between two parallel metal plates? Okay, I can understand it through electric field lines. But how can this be quantitatively confirmed? My intuition is that as the charge approaches the metal plate, r becomes very small, so according to Coulomb's law, a...

Is it correct to define Riemann integrability as follows: 'For any ϵ>0, there exists a δ>0 such that if the maximum interval length of the partition is less than δ, then the difference between the upper and lower Riemann sums is less than or equal to ϵ'? I wanted to define Riemann integrability...

∣r⟩,∣l⟩,∣i⟩, and ∣o⟩ can all be expressed as expressions for ∣u⟩ and ∣d⟩. So, given the state vector ∣ψ⟩ = α∣u⟩ + β∣d⟩, is it possible to know not only the probability of ∣u⟩ but also the probability of ∣r⟩ and ∣i⟩? ∣ψ⟩ can be expressed as an expression for ∣r⟩, ∣l⟩ or ∣i⟩, ∣o⟩.

There is a magnet in the shape of a hollow sphere. And the inner surfaces are all n-poles, and the outer surfaces are all s-poles. At this time, how is the magnetic field formed in the empty space of the sphere? There is no s pole for the magnetic force lines from the n pole to enter, so can...

no. Most of it has been resolved. thank you

I'm not claiming that mass changes. Rather, it was taken advantage of. Because the mass of a star does not change, it was thought that when stars of the same mass were plotted on the H-R diagram, it would correspond to their evolutionary path. No. I had no such Imagination. I think you...

I see

Yes.. thank you

The post-AGB phase is short-lived, and the mass changes after the supernova explosion. Therefore, doesn't the scatter plot mainly consist of the process from main sequence stars to supergiants, and can appear in a form close to a straight line?

In the case of stars with a mass of 0.43 to 2 times that of the Sun, the relationship is known to be (luminosity/luminosity of the Sun) = (mass/mass of the Sun)^4. Through this, the mass of the star was obtained. I plotted stars of similar mass on Hertzsprung–Russell diagram, and confirmed the...

I analyzed the relationship between the surface temperature and luminosity of stars of similar mass using a regression model. Through this, I was able to obtain a regression line. Since stars of similar mass show similar evolutionary paths, I believe this regression line can be viewed as a rough...