# Kategorie Argief: Fisika

Fisika was my eerste liefde. Hierdie kategorie bevat die poste wat die naaste aan my hart. Twintig jaar van nou af, As hierdie blog oorleef, hierdie kategorie sal waarskynlik my mees blywende insigte hou. En twee honderd jaar van nou af, as ek onthou ten alle, dit sal wees vir hierdie insigte; nie vir die soort van persoon wat ek is, die geld wat ek maak, of enigiets anders. Slegs vir my eerste en laaste liefde…

# Herhaling van die moderne fisika

Sedert die post-reeks op deeltjies en interaksies het 'n bietjie langer as wat ek wou, Ek het gedink ek sou dit op te breek. Kom ons begin met 'n herhaling van die moderne fisika wat jou sal benodig om die struktuur van materie te verstaan.

# Interpretation of Special Relativity

When we looked at Quantum Mechanics, we talked about its various interpretations. The reason we have such interpretations, I said, is that QM deals with a reality that we have no access to, through our sensory and perceptual apparatuses. Aan die ander kant, Special Relativity is about macro objects in motion, and we have no problem imagining such things. So why would we need to have an interpretation? The answer is a subtle one.
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# Speed of Light

The speed of light being a constant sounds like a simple statement. But there is more to it, quite a bit more. Let’s look at what this constancy really means. Met die eerste oogopslag, it says that if you are standing somewhere, and there is a ray of light going from your right to left, it has a speed c. And another ray of light going from left to right also has a speed c. So far, so good. Now let’s say you are in a rocket ship, soos getoon in die figuur hieronder, moving from right to left.

# Spesiale relatiwiteitsteorie

Wanneer ons hoor van Einstein en die spesiale relatiwiteit (of die spesiale relatiwiteitsteorie, om die regte naam te gebruik), Ons dink aan die beroemde $E = mc^2$ vergelyking, en vreemde dinge soos die tweeling paradoks. Terwyl hierdie dinge is almal ware en belangrike, die probleem SR probeer om op te los is 'n heeltemal ander een. Dit is 'n poging om 'n basiese beginsel te verdedig in fisika.
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# Quantum Mechanics – Interpretations

Whenever we talk about Quantum Mechanics, one of the first questions would be, “What about the cat?” This question, regtig, is about the interpretations of Quantum Mechanics. The standard interpretation, die sogenaamde Kopenhagen interpretasie, leads to the famous Schrodinger’s cat.
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# Quantum Field Theory

In this post on Quantum Mechanics (QM), we will go a bit beyond it and touch upon Quantum Field Theory – the way it is used in particle physics. In the last couple of posts, I outlined a philosophical introduction to QM, as well as its historical origin – how it came about as an ad-hoc explanation of the blackbody radiation, and a brilliant description of the photoelectric effect.
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# Historical Origin of Quantum Mechanics

In hierdie afdeling, we will try to look at the historical origin of Quantum Mechanics, which is usually presented succinctly using scary looking mathematical formulas. The role of mathematics in physics, as Richard Feynman explains (in his lectures on QED given in Auckland, New Zealand in 1979, available on YouTube, but as poor quality recordings) is purely utilitarian.
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# Kwantummeganika

Kwantummeganika (QM) is the physics of small things. How do they behave and how do they interact with each other? Conspicuously absent from this framework of QM is why. Why small things do what they do is a question QM leaves alone. En, if you are to make any headway into this subject, your best bet is to curb your urge to ask why. Nature is what she is. Our job is to understand the rules by which she plays the game of reality, and do our best to make use of those rules to our advantage in experiments and technologies. Ours is not to reason why. Regtig.

# Classical Physics

The main difficulty in describing particle physics to general public is the fact that it is built on modern physics. Even if you are physics aficionado and did extremely well in your high school physics, what you have learned and loved is classical physics. The difference between classical physics and modern physics is not just more physics, but a completely new way of looking at the reality around us.
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# reduksionisme

In al ons wetenskaplike pogings, Ons gebruik dieselfde hoë-vlak tegnieke te verstaan ​​en te bestudeer dinge. Die mees algemene tegniek is reduksionisme. Dit is gebaseer op die oortuiging dat die gedrag, eienskappe en struktuur van 'n groot en komplekse voorwerpe kan verstaan ​​word in terme van hul eenvoudiger bestanddele. Met ander woorde, Ons probeer om die geheel te verstaan (die heelal, byvoorbeeld) in terme van kleiner, verminder bestanddele (soos deeltjies).