[{"data":1,"prerenderedAt":298},["ShallowReactive",2],{"project-28421209":3},{"id":4,"name":5,"line":6,"line_source":7,"title":8,"url":9,"domain":10,"maker":11,"posted_at":12,"year":13,"points":14,"comments":15,"rank_in_year":16,"shown_in_year":17,"top":18,"tier":19,"category":20,"subcategory":21,"format":22,"keywords":23,"reception":28,"sentiment":29,"stance_mix":30,"scored_comments":34,"aspects":35,"strip":42,"post_text":45,"what":46,"said":69,"maker_in_thread":154,"shape":166,"grid":170,"attempts":259,"same_week":260,"maker_shows":33,"maker_hidden":290,"reader_version":291,"card":292},"28421209","Relativity","A Modern Primer","title","Show HN: Relativity: A Modern Primer","http:\u002F\u002Framp-book.com\u002F","ramp-book.com","fferen",1630808965,2021,204,39,225,2533,9,"notable","learning_science","physics textbook","other",[24,25,26,27],"special relativity","general relativity","physics primer","relativity textbook","loved",0.346,{"positive":31,"neutral":32,"mixed":33,"critical":33},6,7,1,15,{"idea":36,"docs":39,"execution":40,"design":41},{"positive":37,"critical":38},2,0,{"positive":37,"critical":33},{"positive":37,"critical":38},{"positive":38,"critical":38},[43,38,44,38,38,38,38,38,43,44,43,38,38,43,38,38,44,38,44,38,44,44,38,38,43,33,38,38,38,38,38,38,38,44,44,38,38,38,43],5,3,null,{"problem":47,"audience":55,"pricing":45,"motivation":45,"time_to_build":45,"stack":66,"openness":67,"stage":68,"team_size":67},{"value":48,"source":49,"evidence":50},"Learning relativity without wading through long, deep textbooks","commenter",[51],{"id":52,"by":53,"text":54},"28421318","wanderingmind","This is fantastic. I always wanted to learn relativity. But almost all the books I borrowed were so deep targeted towards students who will think about that day in and out. I…",{"value":56,"source":49,"evidence":57},"Mathematically minded readers with linear algebra, calculus and classical mechanics background",[58,62],{"id":59,"by":60,"text":61},"28421888","oefrha","(Physicist here.) Looked at TOC, then skimmed some chapters. The special relativity part of the book is about as deep and denser than most undergraduate introductions, with less…",{"id":63,"by":64,"text":65},"28421790","BeetleB","> I'm not sure how anybody can understand it unless they have completed an undergraduate degree in math AND already have a solid conceptual understanding of relativity. The…",[],"unknown","launched",{"praise":70,"objections":93,"requests":105,"questions":117,"alternatives":128},[71,82],{"value":72,"source":49,"evidence":73},"Concise, solid introduction to GR",[74,78],{"id":75,"by":76,"text":77},"28423006","musgravepeter","I had a quick look and this seems like a solid, concise intro to GR. The article https:\u002F\u002Fpeople.carleton.edu\u002F~nchriste\u002FPTO000041.pdf gives an overview of the ways and books to…",{"id":79,"by":80,"text":81},"28423827","monday_","This is great and way better then the more long-winded textbook explanations. Math is around for a reason and it's good to see it at work by compressing a lot of material into…",{"value":83,"source":49,"evidence":84},"Useful outline and well-ordered sections",[85,89],{"id":86,"by":87,"text":88},"28421945","powera","Maybe call it \"The Mathematics of Relativity\"? It works well as an outline from my point of view, but I think you have to assume the reader already understands the Lagrangian in…",{"id":90,"by":91,"text":92},"28422179","jvvw","For those of us with that background, it looks like it might be really useful though. I've only had a brief look so far, but as somebody who took all the pure courses in my maths…",[94,101],{"value":95,"source":49,"evidence":96},"Very dense, hard to follow without strong math background",[97,100],{"id":98,"by":87,"text":99},"28421354","I'm not sure who this is supposed to be useful to; I'm not sure how anybody can understand it unless they have completed an undergraduate degree in math AND already have a solid…",{"id":86,"by":87,"text":88},{"value":102,"source":49,"evidence":103},"Too much material in the GR section",[104],{"id":86,"by":87,"text":88},[106,113],{"value":107,"source":49,"evidence":108},"EPUB version",[109],{"id":110,"by":111,"text":112},"28424530","Deutscher","Would you mind making this available as an EPUB?",{"value":114,"source":49,"evidence":115},"A similar primer on QFT",[116],{"id":79,"by":80,"text":81},[118],{"value":119,"source":49,"evidence":120},"Intuitive explanation of why time dilation and length contraction happen",[121,125],{"id":122,"by":123,"text":124},"28421736","drewolbrich","@fferen Thank you for sharing your work. This is an excellent resource. If you don’t mind, I have a question. If I drive in a straight line on the Earth’s surface without…",{"id":126,"by":123,"text":127},"28425437","Apologies, I didn't mean to suggest that the two concepts are related. For SR, I'm looking for an answer to \"why?\" that only has same satisfying flavor as the sphere question. I…",[129,133,140,147],{"value":130,"source":49,"evidence":131},"Hartle's Gravity book",[132],{"id":75,"by":76,"text":77},{"value":134,"source":49,"evidence":135},"Taylor and Wheeler's Spacetime Physics",[136],{"id":137,"by":138,"text":139},"28433969","wnoise","I've always had a fondness for Taylor and Wheeler's \"Spacetime Physics\". https:\u002F\u002Fwww.eftaylor.com\u002Fspacetimephysics\u002F",{"value":141,"source":49,"evidence":142},"Sean Carroll's Biggest Ideas in the Universe videos",[143],{"id":144,"by":145,"text":146},"28421688","ericbarrett","I recommend Sean Carroll’s “Biggest Ideas in the Universe” series on YouTube for modern physics. He’s a professor at CalTech. Each is 60-90 minutes with an accompanying 60-90…",{"value":148,"source":49,"evidence":149},"Einstein's Relativity book",[150],{"id":151,"by":152,"text":153},"28421998","dieselerator","That seems a reasonable complaint. For relativity with more explanation and not much math I suggest Relativity (The Special and the General Theory) by Albert Einstein, 1916.…",{"comments":155,"answered":37,"key":156},4,[157,160,163],{"id":158,"text":159},"28421934","This is fair enough. Hopefully some will still find it useful. I will note that I took a special relativity course in university that did things the \"slow and intuitive\" way, and…",{"id":161,"text":162},"28421941","Thanks! I don't believe these two concepts are related. You get back to the same point because the earth is _globally_ a sphere. However, time dilation and length contraction are…",{"id":164,"text":165},"28428775","I see. I don't know of a great answer, but it comes down to the constant speed of light. The simplest clock is two parallel mirrors with light bouncing back and forth. If someone…",{"commenters":167,"max_depth":155,"maker_replies":155,"first_comment_mins":168,"lifespan_hours":169},24,31,188,[171,173,175,177,179,182,185,188,191,193,195,196,198,201,203,207,209,213,214,215,216,219,222,224,225,229,231,234,238,241,243,245,247,249,251,253,255,256,258],[52,38,43,172,53,38],"project\u002Fpositive\u002Fidea",[144,38,38,174,145,38],"other\u002Fneutral\u002Fnone",[59,38,44,176,60,38],"project\u002Fneutral\u002Fdocs",[158,38,38,178,11,33],"maker\u002Fneutral\u002Fdocs",[180,38,38,181,60,38],"28421989","commenter\u002Fneutral\u002Fdocs",[183,38,38,174,184,38],"28422103","MathMonkeyMan",[186,38,38,174,187,38],"28423329","chisquared",[189,38,38,174,190,38],"28424056","Koshkin",[75,33,43,192,76,38],"project\u002Fpositive\u002Fexecution",[110,37,44,194,111,38],"project\u002Fneutral\u002Fdesign",[79,44,43,192,80,38],[197,44,38,174,190,38],"28424006",[199,44,38,200,80,38],"28424147","commenter\u002Fpositive\u002Fnone",[122,155,43,202,123,38],"maker\u002Fpositive\u002Fidea",[204,155,38,205,206,38],"28421762","commenter\u002Fneutral\u002Fidea","mhh__",[208,155,38,205,190,38],"28424176",[210,155,44,211,212,38],"28421808","maker\u002Fneutral\u002Fidea","richardw",[161,155,38,211,11,33],[126,155,44,211,123,38],[164,155,38,211,11,33],[217,155,44,211,218,38],"28422347","random314",[220,155,44,211,221,38],"28422412","cygx",[223,155,38,174,218,38],"28505618",[137,43,38,174,138,38],[226,31,43,227,228,38],"28421772","project\u002Fpositive\u002Fdocs","motohagiography",[98,32,33,230,87,38],"project\u002Fcritical\u002Fdocs",[232,32,38,181,233,38],"28421549","pvg",[235,32,38,236,237,38],"28421574","commenter\u002Fcritical\u002Fidea","goldenkey",[239,32,38,236,240,38],"28421664","AnimalMuppet",[242,32,38,205,237,38],"28421730",[244,32,38,205,190,38],"28424986",[246,32,38,205,237,38],"28425561",[248,32,38,178,11,33],"28421581",[250,32,44,176,206,38],"28421778",[86,32,44,252,87,38],"project\u002Fmixed\u002Fdocs",[254,32,38,181,206,38],"28421774",[63,32,38,181,64,38],[151,32,38,257,152,38],"other\u002Fneutral\u002Fdocs",[90,32,43,227,91,38],[],[261,266,271,276,281,286],{"id":262,"name":263,"points":264,"category":265},"28446147","Bonsai",1070,"dev_tools",{"id":267,"name":268,"points":269,"category":270},"28435613","Age 1.0",494,"security_privacy",{"id":272,"name":273,"points":274,"category":275},"28400446","Note Garden",268,"productivity",{"id":277,"name":278,"points":279,"category":280},"28451071","locserendipity.com",266,"creative",{"id":282,"name":283,"points":284,"category":285},"28389773","HN Badges",242,"consumer_social",{"id":287,"name":288,"points":289,"category":20},"28442022","Xirva",238,false,"v2",{"id":293,"name":5,"line":6,"ai":290,"cat":20,"year":13,"points":14,"comments":15,"rec":28,"s":294,"top":18,"kw":295,"maker":11,"domain":10,"tier":19,"attempts":38,"strip":296,"url":9,"mix":297,"praise":72,"objection":95,"sub":21},28421209,0.35,[24,25,26,27],"503000005350050030303300510000000330005",[31,32,33,33],1794036610901]