相对论

: 相对论

共 14 讨论,7天新增13个讨论,30天新增14个讨论

综合问题文章简介

长尾科技 发起了提问 2022-06-07 11:53 相对论: 问答如何看待格里菲斯的《电动力学导论》？

因为狭义相对论主要是从电动力学发展出来的，所以一般电动力学的最后一章都会讲狭义相对论的内容，从这个角度去理解狭义相对论会更加自然。格里菲斯的《电动力学导论》就是其中非常好的一本书，大家可以在这里一起学习这本书，有什么问题和想法都可以在这里讨论。此问题隶属于更高层级的问题《相对论的【学习路径图】是什么...; 关注问题 1 1人感谢 0评论

长尾科技 发起了提问 2022-06-07 11:50 相对论: 问答一起学习周磊老师的《电动力学》视频教程

因为狭义相对论主要是从电动力学发展出来的，所以一般电动力学的最后一章都会讲狭义相对论的内容，从这个角度去理解狭义相对论会更加自然。周磊老师的视频《电动力学周磊复旦大学-HD》讲得非常好，大家在学习过程中有什么问题和想法可以来这里讨论。此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？...; 关注问题 1 0人感谢 0评论

长尾科技 发起了提问 2022-06-07 11:33 相对论: 问答一起学习梁灿彬老师的《从零学相对论》

梁老师的《从零学相对论》是一本极好的相对论入门教材，它非常通俗，对读者比较友好，希望系统学习相对论的朋友绝对要仔细看这本书。大家在学习过程中有什么问题，想法，都可以在这里沟通，大家来一起把梁老师的《从零学相对论》学透。此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？如何系统地学习相对论...; 关注问题 1 0人感谢 0评论

长尾科技 发起了提问 2022-06-07 11:23 相对论: 问答如何看待布莱恩·格林的《宇宙的琴弦》？

格林的《宇宙的琴弦》是超弦理论的经典科普书，但它在前面也会科普相对论相关的内容。此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？如何系统地学习相对论？》，属于相对论学习路径图的一部分。大家可以在这里讨论这两篇文章的相关内容，也可以去更高层级的问题讨论相对论的学习路径图。上层链接：相对论...; 关注问题 1 0人感谢 0评论

长尾科技 发起了提问 2022-06-07 11:21 相对论: 问答如何看待卡洛·罗韦利的《现实不似你所见》？

此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？如何系统地学习相对论？》，属于相对论学习路径图的一部分。大家可以在这里讨论这两篇文章的相关内容，也可以去更高层级的问题讨论相对论的学习路径图。上层链接：相对论的【学习路径图】是什么样的？如何系统地学习相对论？; 关注问题 1 0人感谢 0评论

长尾科技 发起了提问 2022-06-07 11:18 相对论: 问答如何看待基普·索恩的《黑洞与时间弯曲》？

索恩的这本书是科普黑洞的名著，因为相对论是黑洞的基础，所以，他在这本书的前面会先科普相对论相关的知识。此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？如何系统地学习相对论？》，属于相对论学习路径图的一部分。大家可以在这里讨论这两篇文章的相关内容，也可以去更高层级的问题讨论相对论的学习路...; 关注问题 1 0人感谢 0评论

长尾科技 发起了提问 2022-06-07 11:16 相对论: 问答如何看待布莱恩·格林的《宇宙的结构》？

布莱恩·格林的《宇宙的结构》是一本包罗万象的科普书，里面最开始部分也会科普一些相对论和量子力学的知识。此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？如何系统地学习相对论？》，属于相对论学习路径图的一部分。大家可以在这里讨论这两篇文章的相关内容，也可以去更高层级的问题讨论相对论的学习路...; 关注问题 1 0人感谢 0评论

长尾科技 发起了提问 2022-06-07 11:12 相对论: 问答如何看待汪洁的相对论科普书《时间的形状》？

《时间的形状》是一本比较通俗的相对论科普书，零基础的朋友基本上也能看得懂。此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？如何系统地学习相对论？》，属于相对论学习路径图的一部分。大家可以在这里讨论这两篇文章的相关内容，也可以去更高层级的问题讨论相对论的学习路径图。上层链接：相对论的【学...; 关注问题 1 0人感谢 0评论

长尾科技 发起了提问 2022-06-07 10:29 相对论: 问答如何看待长尾科技的《你也能懂的质能方程E=mc²》？

长尾科技科技关于质能方程的文章：《你也能懂的质能方程E=mc²》（2.1万字）此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？如何系统地学习相对论？》，属于相对论学习路径图的一部分。大家可以在这里讨论这两篇文章的相关内容，也可以去更高层级的问题讨论相对论的学习路径图。上层链接：相对论的...; 关注问题 1 0人感谢 0评论

长尾科技 发起了提问 2022-06-07 10:26 相对论: 问答如何看待长尾科技关于相对论历史的两篇文章（相对论前夜和诞生篇）？

长尾科技的两篇关于相对论的历史的文章：1、相对论前夜：牛顿和麦克斯韦的战争（1.7万字）2、相对论诞生：爱因斯坦是如何创立狭义相对论的？| 主线（3.3万字）此问题隶属于更高层级的问题《相对论的【学习路径图】是什么样的？如何系统地学习相对论？》，属于相对论学习路径图的一部分。...; 关注问题 1 0人感谢 0评论

长尾科技 回复了问题 2022-06-07 10:32 相对论: 问答相对论的【学习路径图】是什么样的？如何系统地学习相对论？

长尾科技 :1、完全零基础的朋友可以先看看长尾科技的四篇关于狭义相对论的主线文章。相对论的历史):1.2、相对论诞生：爱因斯坦是如何创立狭义相对论的？| 主线（3.3万字）然后是关于关于质能方程的讨论（想进一步讨论质能方程可以来这里：如何看待长尾科技的《你也能懂的质能方程E=mc²》？）：1.4、《...; 赞同4 反对 0人感谢 0评论 1回复

林威 发起了提问 2022-05-31 01:29 温度计 物理: 问答极低温的温度计测温的原理是什么？

在0.1K以下的极低温环境，是由什么仪器可以测量出如此低的温度？仪器的实现原理是什么？; 关注问题 1 0人感谢 0评论

林威 回复了问题 2022-05-29 01:05 站务公式: 问答如何在悟理上发带公式的文章？

林威 :最简便的方法：用LaTeX。LaTeX是科研界最常用的公式语法。学习资料很多，后续悟理平台也会逐步搬运一些LaTeX相关的文章。1、需要假设我们已经会用LaTeX来描述需要打出的公式了。或者已经手写公式，由自动化网站或朋友转换出了LaTeX代码。2、我们可以访问Markdown Nice，这是一个支...; 赞同4 反对 0人感谢 0评论 1回复

文章四维形式的狭义相对论及其动力学

作者|yubr编辑|Trader Joe's在前一章《闵氏空间和洛伦兹变换》中我们已经介绍了闵氏几何和四维语言，在本章中我们将使用前一章介绍的四维语言来描述狭义相对论及其动力学。固有时（proper time）假设给定两个事件，我们...

狭义相对论 相对论

赞同3  865浏览  0评论 yubr 2022-05-24 23:09

文章简谐振动的运动学方程是怎么来的？

简谐振动是最简单最基本的振动，它的典型例子是弹簧振子。水平弹簧振子什么是弹簧振子呢？一个不考虑质量的弹簧连接一个有质量的小球或物块，然后把它沿着弹簧的方向压缩或者拉伸一定的距离（不要拉得太狠，悠着点儿）后松手，那么物块就会只在弹簧弹力的作用...

振动 牛顿力学

赞同3  830浏览  1评论 小熊君 2022-05-18 16:02

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CONNECT:[ UseTime:0.000370s ] mysql:host=127.0.0.1;port=3306;dbname=wuphysthink;charset=utf8mb4
SHOW FULL COLUMNS FROM `aws_hook_plugins` [ RunTime:0.000507s ]
SELECT `hook`,`plugins` FROM `aws_hook_plugins` WHERE `status` = 1 ORDER BY `sort` DESC [ RunTime:0.000278s ]
SHOW FULL COLUMNS FROM `aws_config` [ RunTime:0.000812s ]
SELECT * FROM `aws_config` [ RunTime:0.000671s ]
SHOW FULL COLUMNS FROM `aws_topic` [ RunTime:0.000628s ]
SHOW FULL COLUMNS FROM `aws_forbidden_ip` [ RunTime:0.000456s ]
SELECT `ip` FROM `aws_forbidden_ip` [ RunTime:0.000241s ]
SHOW FULL COLUMNS FROM `aws_admin_group` [ RunTime:0.000487s ]
SELECT `permission` FROM `aws_admin_group` WHERE `id` = 5 LIMIT 1 [ RunTime:0.000290s ]
SHOW FULL COLUMNS FROM `aws_users_online` [ RunTime:0.000421s ]
DELETE FROM `aws_users_online` WHERE `last_login_time` < 1750233391 [ RunTime:0.004740s ]
SHOW FULL COLUMNS FROM `aws_menu_rule` [ RunTime:0.000483s ]
SELECT * FROM `aws_menu_rule` WHERE `status` = 1 AND `group` = 'nav' ORDER BY `sort` ASC,`id` ASC [ RunTime:0.000409s ]
SELECT * FROM `aws_menu_rule` WHERE `status` = 1 AND `group` = 'footer' ORDER BY `sort` ASC,`id` ASC [ RunTime:0.000339s ]
SELECT * FROM `aws_topic` WHERE `id` = 18 LIMIT 1 [ RunTime:0.000428s ]
SHOW FULL COLUMNS FROM `aws_topic_focus` [ RunTime:0.000488s ]
SELECT `uid` FROM `aws_topic_focus` WHERE `topic_id` = 18 ORDER BY RAND() LIMIT 0,10 [ RunTime:0.000342s ]
SHOW FULL COLUMNS FROM `aws_topic_relation` [ RunTime:0.000588s ]
SELECT `item_id`,`item_type` FROM `aws_topic_relation` WHERE ( status=1 AND topic_id IN(18) ) [ RunTime:0.000381s ]
SHOW FULL COLUMNS FROM `aws_post_relation` [ RunTime:0.000558s ]
SELECT COUNT(*) AS think_count FROM `aws_post_relation` WHERE `status` = 1 AND `item_type` IN ('question','article','') AND `item_id` IN (38,16,15,21,22,23,24,25,26,27,28,29,30,31) AND `item_type` IN ('article','question') LIMIT 1 [ RunTime:0.000558s ]
SELECT `id`,`item_id`,`item_type`,`uid` FROM `aws_post_relation` WHERE `status` = 1 AND `item_type` IN ('question','article','') AND `item_id` IN (38,16,15,21,22,23,24,25,26,27,28,29,30,31) AND `item_type` IN ('article','question') ORDER BY `set_top_time` DESC,`create_time` DESC LIMIT 0,15 [ RunTime:0.000552s ]
SHOW FULL COLUMNS FROM `aws_question` [ RunTime:0.000767s ]
SELECT `last_answer` FROM `aws_question` WHERE `id` IN (31,30,29,28,27,26,25,24,23,22,21,16,15) AND `status` = 1 [ RunTime:0.000387s ]
SHOW FULL COLUMNS FROM `aws_answer` [ RunTime:0.000484s ]
SELECT * FROM `aws_answer` WHERE `status` = 1 AND `id` IN (17,1,32,0) [ RunTime:0.000396s ]
SELECT `topic_id`,`item_type`,`item_id` FROM `aws_topic_relation` WHERE `item_id` IN (31,30,29,28,27,26,25,24,23,22,21,16,15) AND `item_type` = 'question' [ RunTime:0.000420s ]
SELECT * FROM `aws_topic` WHERE `id` IN (5,71,78,2,18) [ RunTime:0.000307s ]
SELECT * FROM `aws_question` WHERE `status` = 1 AND `id` IN (31,30,29,28,27,26,25,24,23,22,21,16,15) [ RunTime:0.000884s ]
SELECT `topic_id`,`item_type`,`item_id` FROM `aws_topic_relation` WHERE `item_id` IN (38,31) AND `item_type` = 'article' [ RunTime:0.000356s ]
SELECT * FROM `aws_topic` WHERE `id` IN (42,23,19,18) [ RunTime:0.000323s ]
SHOW FULL COLUMNS FROM `aws_article` [ RunTime:0.000808s ]
SELECT * FROM `aws_article` WHERE `status` = 1 AND `id` IN (38,31) [ RunTime:0.001723s ]
SHOW FULL COLUMNS FROM `aws_users` [ RunTime:0.000977s ]
SELECT `uid`,`nick_name`,`user_name`,`salt`,`email`,`mobile`,`sex`,`is_first_login`,`inbox_unread`,`notify_unread`,`fans_count`,`friend_count`,`available_invite_count`,`is_valid_email`,`is_valid_mobile`,`integral`,`reputation`,`reputation_update_time`,`avatar`,`signature`,`verified`,`group_id`,`integral_group_id`,`reputation_group_id`,`last_login_time`,`last_login_ip`,`reg_ip`,`money`,`frozen_money`,`deal_password`,`birthday`,`url_token`,`views_count`,`agree_count`,`question_count`,`answer_count`,`article_count`,`draft_count`,`topic_focus_count`,`column_count`,`extend`,`status`,`theme`,`create_time`,`update_time` FROM `aws_users` WHERE `status` = 1 AND `uid` IN (5,1,55,10,32) [ RunTime:0.000619s ]
SELECT `last_login_time` FROM `aws_users_online` WHERE `uid` = 1 LIMIT 1 [ RunTime:0.000310s ]
SELECT `user_name`,`url_token` FROM `aws_users` WHERE `uid` = 1 LIMIT 1 [ RunTime:0.000283s ]
SELECT `last_login_time` FROM `aws_users_online` WHERE `uid` = 5 LIMIT 1 [ RunTime:0.000296s ]
SELECT `user_name`,`url_token` FROM `aws_users` WHERE `uid` = 5 LIMIT 1 [ RunTime:0.000292s ]
SELECT `last_login_time` FROM `aws_users_online` WHERE `uid` = 10 LIMIT 1 [ RunTime:0.000303s ]
SELECT `user_name`,`url_token` FROM `aws_users` WHERE `uid` = 10 LIMIT 1 [ RunTime:0.000300s ]
SELECT `last_login_time` FROM `aws_users_online` WHERE `uid` = 32 LIMIT 1 [ RunTime:0.000302s ]
SELECT `user_name`,`url_token` FROM `aws_users` WHERE `uid` = 32 LIMIT 1 [ RunTime:0.000298s ]
SELECT `last_login_time` FROM `aws_users_online` WHERE `uid` = 55 LIMIT 1 [ RunTime:0.000304s ]
SELECT `user_name`,`url_token` FROM `aws_users` WHERE `uid` = 55 LIMIT 1 [ RunTime:0.000297s ]
SHOW FULL COLUMNS FROM `aws_question_vote` [ RunTime:0.000547s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 31 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000357s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 30 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000356s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 29 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000320s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 28 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000319s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 27 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000317s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 26 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000328s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 25 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000338s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 24 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000334s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 23 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000332s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 22 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000332s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 32 AND `item_type` = 'answer' LIMIT 1 [ RunTime:0.000317s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 21 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000327s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 16 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000322s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 17 AND `item_type` = 'answer' LIMIT 1 [ RunTime:0.000343s ]
SELECT `vote_value` FROM `aws_question_vote` WHERE `uid` = 0 AND `item_id` = 15 AND `item_type` = 'question' LIMIT 1 [ RunTime:0.000338s ]
SHOW FULL COLUMNS FROM `aws_article_vote` [ RunTime:0.000587s ]
SELECT `vote_value` FROM `aws_article_vote` WHERE `uid` = 0 AND `item_id` = 38 AND `item_type` = 'article' LIMIT 1 [ RunTime:0.000338s ]
SELECT `vote_value` FROM `aws_article_vote` WHERE `uid` = 0 AND `item_id` = 31 AND `item_type` = 'article' LIMIT 1 [ RunTime:0.000335s ]
SELECT COUNT(*) AS think_count FROM `aws_topic` WHERE `status` = 1 AND `discuss_month` > 0 LIMIT 1 [ RunTime:0.000486s ]
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