Bilis ng Banayad

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. Sa unang tingin, 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, tulad ng ipinapakita sa figure sa ibaba, moving from right to left.

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Special Theory of Relativity

Kapag marinig namin ang tungkol Einstein at ang mga espesyal na kapamanggitan (o ang espesyal na teorya ng kapamanggitan, upang gamitin ang mga tunay na pangalan), sa tingin namin ng sikat na E = mc^2 ekwasyon, at kakaiba mga bagay tulad ng mga twin kabalintunaan. Habang ang mga bagay na ito ay ang lahat ng tunay at mahalagang, ang problema SR sumusubok upang malutas ay isang ganap na iba't ibang mga isa. Ito ay isang pagtatangka upang ipagtanggol ang isang pangunahing prinsipyo sa physics.
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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

Sa seksyong ito, 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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Quantum Mechanics

Quantum Mechanics (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. At, 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. Talaga.

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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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reductionism

Sa lahat ng aming pang-agham endeavors, ginagamit namin katulad na mga pamamaraan ng mataas na antas upang maunawaan at pag-aralan ng mga bagay. Ang pinaka-karaniwang pamamaraan ay reductionism. Ito ay batay sa paniniwala na ang pag-uugali, mga katangian at istraktura ng malaki at kumplikadong mga bagay ay maaaring maunawaan sa mga tuntunin ng kanilang simple constituents. Sa ibang salita, subukan namin upang maunawaan ang buong (uniberso, halimbawa) sa mga tuntunin ng mas maliit na, nabawasan constituents (tulad ng mga particle).

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Particles at Pakikipag-ugnayan

Kamakailan lamang, Nagbigay ako ng isang talk sa mga particle at mga pakikipag-ugnayan sa mga kamag-aral ang aking anak na babae ni sino ay pagpaplano sa isang paglalakbay sa Desy, Germany at nais na magkaroon ng isang ideya ng kung ano ito ay lahat ng tungkol sa. Tulad ng aking unang makipag-usap ng ganitong uri, Ako ay isang bit kinakabahan dahil hindi ko alam kung ano ang antas, at background, ang dapat kong peg ang makipag-usap sa. Hindi ko nais upang gawin itong masyadong basic, na kung saan Akala ko ay magiging isang basura ng oras. Hindi rin Gusto kong gawin itong masyadong teknikal, na kung saan din ay gawin itong walang silbi sa ibang paraan.

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Sensory and Physical Worlds

Animals have different sensory capabilities compared to us humans. Cats, halimbawa, can hear up to 60kHz, while the highest note we have ever heard was about 20kHz. Tila, we could hear that high a note only in our childhood. Kaya, if we are trying to pull a fast one on a cat with the best hifi multi-channel, Dolby-whatever recording of a mouse, we will fail pathetically. It won’t be fooled because it lives in a different sensory world, while sharing the same physical world as ours. There is a humongous difference between the sensory and physical worlds.

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