Vedátorský podcast 295 – FAQ

·32 min·3 clips

Why particles moving faster than light in water don't create time travel paradoxes reveals a misnamed cosmic constant.

The episode is a Q&A session where hosts Jozef and Samuel answer listener-submitted science questions. It begins with a question about the differences between hydrogen engines and traditional combustion engines, explaining hydrogen combustion and fuel cells. Next, they address why particles moving faster than light in water produce Cherenkov radiation but don't create time travel paradoxes, clarifying that 'speed of light' is a misnomer for a universal speed limit. A question about magnetic monopoles leads to a discussion of their theoretical existence in grand unified theories and how even one monopole could explain equal electron and proton charges. The three-body problem in physics is explained as chaotic due to broken symmetries, contrasting with stable two-body systems like Earth orbiting the Sun. A listener asks about a gravitational mirror to see Earth's past, with the hosts noting it's theoretically possible but impractical due to signal scattering. Sleep tips involving eye masks and earplugs are shared, along with facts about animal navigation using the moon and stars. Another question calculates that only about 0.039% of Earth's atmosphere is visible from the ground. The hosts discuss whether dark matter falls into black holes, explaining it depends on if dark matter can lose energy through friction. They also explain why electrons don't lose energy orbiting atomic nuclei, thanks to quantum mechanics replacing classical models. The episode concludes with definitions of astronomical units like parsecs and light-years, and a listener compliment on the podcast's improvement.

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