Dr. Jorge Diaz
@jsdiaz.bsky.social
Theoretical physicist in industry. Making physics videos on youtube.com/@jkzero. Nuclear-physics junkie. Aspiring Bayesian. Former #neutrino analyst.
oh yeah, some lazy versions of the story simply claim that Taylor just assumed this constant to be 1, which I even find offensive when you see all the work behind that calculation
September 29, 2025 at 9:24 PM
oh yeah, some lazy versions of the story simply claim that Taylor just assumed this constant to be 1, which I even find offensive when you see all the work behind that calculation
he was also known as "the Italian navigator that landed in the new world" when the Chicago Pile reached criticality
September 29, 2025 at 9:09 PM
he was also known as "the Italian navigator that landed in the new world" when the Chicago Pile reached criticality
an important question is: where does the value on the rhs of eq. (1) comes from? Some versions of the story claim that he guessed it or that he calibrated it from small explosions, the truth is that most of his paper is about calculating this number. I made a video about this youtu.be/8ru_LpjuabY
Size of a nuclear blast
YouTube video by Dr. Jorge S. Diaz
youtu.be
September 29, 2025 at 9:06 PM
an important question is: where does the value on the rhs of eq. (1) comes from? Some versions of the story claim that he guessed it or that he calibrated it from small explosions, the truth is that most of his paper is about calculating this number. I made a video about this youtu.be/8ru_LpjuabY
enjoy beautiful Heidelberg, despite the clouds and windy start of the week. We save the sun for the last part of the week, enjoy!
September 17, 2025 at 6:21 PM
enjoy beautiful Heidelberg, despite the clouds and windy start of the week. We save the sun for the last part of the week, enjoy!
thanks for clarifying your point, I get it now, I misunderstood it.
September 11, 2025 at 4:22 PM
thanks for clarifying your point, I get it now, I misunderstood it.
I strongly disagree with the "we should do everything we can to keep them around," what if the person doesn't want to "be kept around"? maybe the person wants stability, mental health, a life... the "we should do everything we can to keep them around" sounds like focusing the PI's viewpoint only.
August 31, 2025 at 7:54 PM
I strongly disagree with the "we should do everything we can to keep them around," what if the person doesn't want to "be kept around"? maybe the person wants stability, mental health, a life... the "we should do everything we can to keep them around" sounds like focusing the PI's viewpoint only.
sí, claro, Luis Huerta era el nombre que todos escuchábamos. Buenos tiempos.
August 19, 2025 at 6:58 PM
sí, claro, Luis Huerta era el nombre que todos escuchábamos. Buenos tiempos.
qué buenos recuerdos me traes, Martín. Muy bien la pasé en las Olimpiadas de Física en Chile, hice buenos amigos y volví a casa con medallas tres años consecutivos
August 18, 2025 at 6:06 PM
qué buenos recuerdos me traes, Martín. Muy bien la pasé en las Olimpiadas de Física en Chile, hice buenos amigos y volví a casa con medallas tres años consecutivos
when I was an undergraduate student, I was convinced that "Bremsstrahlung" was the last name of some German physicist named Wilhelm Bremsstrahlung, or something like that. Just like "Gauge invariance" was obviously named after some French physicist named François Gauge.
August 10, 2025 at 9:37 AM
when I was an undergraduate student, I was convinced that "Bremsstrahlung" was the last name of some German physicist named Wilhelm Bremsstrahlung, or something like that. Just like "Gauge invariance" was obviously named after some French physicist named François Gauge.
Some people find meaning in relationships between fundamental numbers, I find it useless but amusing. Here is one that I found many years ago: the abundance of U-235 in natural uranium (0.72%) is equal to the approximate value of the fine-structure constant (1/137)
July 7, 2025 at 7:54 PM
Some people find meaning in relationships between fundamental numbers, I find it useless but amusing. Here is one that I found many years ago: the abundance of U-235 in natural uranium (0.72%) is equal to the approximate value of the fine-structure constant (1/137)
the dark oval is the region of low light intensity and the bright ring around is the convergence of light rays refracted away from the center. I think it is the static version of dark and bright zones at the bottom of a pool. I am not an optics expert, this is just how I interpret this phenomenon.
April 24, 2025 at 7:18 PM
the dark oval is the region of low light intensity and the bright ring around is the convergence of light rays refracted away from the center. I think it is the static version of dark and bright zones at the bottom of a pool. I am not an optics expert, this is just how I interpret this phenomenon.
I love those shadows, my guess is that this is a mixture of surface tension and Snell's law: the bug deforms the water surface tilting the normal towards the bug's leg producing an effective "diverging lens" so light rays are refracted away from where they would have landed in the absence of the bug
April 24, 2025 at 6:49 PM
I love those shadows, my guess is that this is a mixture of surface tension and Snell's law: the bug deforms the water surface tilting the normal towards the bug's leg producing an effective "diverging lens" so light rays are refracted away from where they would have landed in the absence of the bug