Comment Re:Quick question (Score 1) 37
In the video linked by the GP:
3:47 - she asks where do the neutrinos come from? And then answers "we don't really know, we just know they exist, which we kind of knew that already". The implication is it didn't do anything new. This is incorrect. IceCube detects around 200M neutrinos per day. Because neutrinos travel in straight lines whereas cosmic rays can be deflected by magnetic fields, this neutrino mapping process is actually a good way to trace the locations of high energy events, and they were able to trace the neutrinos origins in high energy events. Most neutrinos they detect are low energy and form a kind of background glow across the sky; those are much harder to trace the origin. Does that mean it's not valuable? Not at all, it means those low energy neutrinos are something we just don't understand yet, but do have the data for. So suggesting IceCube only detected the presence of something we already knew and nothing else about their origin is just a total distortion; rather it created a new way of looking at the universe were just beginning to understand.
4:04 - she asks "What is it good for? nothing really. it does teach us something about neutrino sources outside our galaxy but that's pretty much it." Again this is a distortion. We have data we never had, just because today we're not ready to interpret it doesn't mean it's not useful. But it has been useful. Neutrinos are massless and have no charge, so they escape major astrologically active environments without interference. This created a whole new dimension to "Multi-messenger astronomy", as in we have another tool beyond photons, EM, and gravitational waves to explore the universe, one that has different sources of noise. Neutrinos also travel in perfectly straight lines, creating a new tool to map the galaxy and others. In fact the first neutrino map of the milky way was finished in 2023. One interesting finding from this map is the Milky Way is an order of magnitude dimmer in neutrinos than other galaxies, suggesting our central supermassive black hole as a different kind of activity going on. They are now exploring if dark matter particles when they collide might create neutrinos and see if the neutrino detector can be used to explore dark matter.
The rest of her video is just editorializing and her opinion, coming to a grand sweeping conclusion that modern physics does nothing for human kind. She's entitled to her opinion, but it's not based on the facts. As i stated in another post, the steps it took to build this highly complex device actually created useful tools that are being used in other industries to good effect. Physics is by definition fundamental and aspirational, and the benefit isn't always immediately obvious or direct, but aspirational goals can result in a cascade of new methods, technologies and capabilities just by taking the journey to that aspiration. The value of the journey is by no means discounted just because we may not know what the end of the journey looks like.