{"id":1828,"date":"2026-01-23T18:44:06","date_gmt":"2026-01-23T18:44:06","guid":{"rendered":"https:\/\/qpr.ca\/blogs\/physics\/?p=1828"},"modified":"2026-01-23T18:44:06","modified_gmt":"2026-01-23T18:44:06","slug":"seeing-the-curve","status":"publish","type":"post","link":"https:\/\/qpr.ca\/blogs\/physics\/2026\/01\/23\/seeing-the-curve\/","title":{"rendered":"Seeing the Curve"},"content":{"rendered":"<p>When swimming you can notice the effect over the width of a small lake:<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/qph.cf2.quoracdn.net\/main-qimg-0c058fbee9daffaf70187b0afd432876\" \/><\/p>\n<p><img decoding=\"async\" src=\"https:\/\/qph.cf2.quoracdn.net\/main-qimg-5f6adbe8a9cdebd67ccb50266b74e4ef\" \/><\/p>\n<p>But if you want to see a noticeable effect over just two meters then it depends on what you mean by \u201cnoticeable\u201d (eg it would be a trivial high school exercise to calculate the largest radius at which a two meter tangent line ends at least one mm from the corresponding arc).<\/p>\n<p>Source: <em><a href=\"https:\/\/www.quora.com\/How-close-to-the-Earth-s-core-would-you-need-to-be-to-see-an-uneven-water-level-Not-regarding-temperature-etc-making-it-impossible-how-deep-would-you-have-to-dig-to-see-a-noticeable-curvature-in-lets-say-a-2m-length\/answer\/Alan-Cooper-5\">(1001) Alan Cooper&#8217;s answer to How close to the Earth\u2019s core would you need to be to see an &#8216;uneven&#8217; water level?Not regarding temperature etc making it impossible, how deep would you have to dig to see a noticeable curvature in, lets say a 2m length of water? &#8211; Quora<\/a><\/em><\/p>\n","protected":false},"excerpt":{"rendered":"<p>When swimming you can notice the effect over the width of a small lake: But if you want to see a noticeable effect over just two meters then it depends on what you mean by \u201cnoticeable\u201d (eg it would be a trivial high school exercise to calculate the largest radius at which a two meter &hellip; <a href=\"https:\/\/qpr.ca\/blogs\/physics\/2026\/01\/23\/seeing-the-curve\/\" class=\"more-link\">Continue reading <span class=\"screen-reader-text\">Seeing the Curve<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"topics":[],"class_list":["post-1828","post","type-post","status-publish","format-standard","hentry","category-all"],"_links":{"self":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1828","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/comments?post=1828"}],"version-history":[{"count":1,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1828\/revisions"}],"predecessor-version":[{"id":1830,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/posts\/1828\/revisions\/1830"}],"wp:attachment":[{"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/media?parent=1828"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/categories?post=1828"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/tags?post=1828"},{"taxonomy":"topics","embeddable":true,"href":"https:\/\/qpr.ca\/blogs\/physics\/wp-json\/wp\/v2\/topics?post=1828"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}