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Imaginary line
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<h2 id="examples">Examples</h2> <h3>Geography</h3> <p>As a <a href="/facts/Geography/TRd1Toyo">geographical</a> concept, an imaginary line may serve as an arbitrary division, such as </p> <ul><li><a href="/facts/Antarctic_Circle/8IRf9UHu">Antarctic Circle</a></li> <li><a href="/facts/Arctic_Circle/AlayDpsw">Arctic Circle</a></li> <li><a href="/facts/Border/82NnNLR0">Border</a></li> <li><a href="/facts/International_Date_Line/Q79urxjd">International Date Line</a></li> <li><a href="/facts/Latitude/IBYqkjhU">Latitude</a>, including the <a href="/facts/Equator/CjaxbVaN">Equator</a>, the <a href="/facts/Tropic_of_Capricorn/9jhptsNX">Tropic of Capricorn</a> and the <a href="/facts/Tropic_of_Cancer/c24BAwBj">Tropic of Cancer</a></li> <li><a href="/facts/Longitude/HsC61ML9">Longitude</a>, the <a href="/facts/IERS_Reference_Meridian/tyQSXUSF">Prime Meridian</a><a class="footnote-ref" id="fnref:1" href="#fn:1"><sup>1</sup></a> Any axis about which an object spins is an imaginary line.</li> <li><a href="/facts/Mason%E2%80%93Dixon_line/A5Dh95uL">Mason–Dixon line</a>, which informally marks pieces of the borders of four <a href="/facts/U.S._state/PFwcRIYQ">U.S. states</a>: <a href="/facts/Delaware/4n4I3Rhu">Delaware</a>, <a href="/facts/Maryland/tVy9fC1n">Maryland</a>, <a href="/facts/Pennsylvania/HGqC5bBm">Pennsylvania</a>, and <a href="/facts/West_Virginia/USP8LtCq">West Virginia</a>, once part of <a href="/facts/Virginia/g2kucGdn">Virginia</a>. Symbolically, the line separates the <a href="/facts/Northern_United_States/rEDDwPGk">Northern United States</a> from the <a href="/facts/Southern_United_States/ppnGuAtB">Southern United States</a></li> <li><a href="/facts/Missouri_Compromise_Line/r1CJeDhm">Missouri Compromise Line</a></li> <li><a href="/facts/Time_zone/x5JzdlX8">Time zones</a></li></ul> <h3>Science and engineering</h3> <ul><li><a href="/facts/Sightline/B8g3THP6">Line of sight</a></li> <li><a href="/facts/Optical_ray/PgUEC7Sm">Optical ray</a></li> <li><a href="/facts/Force_lines/peFd780j">Force lines</a> in <a href="/facts/Mechanical_engineering/cbId4fye">mechanical</a> and <a href="/facts/Structural_engineering/Wj1vpoGh">structural engineering</a></li> <li><a href="/facts/Field_line/Nxr20d47">Field lines</a> for <a href="/facts/Electric_field/tt4MooBs">electric</a> and <a href="/facts/Magnetic_field/Ta8Ev588">magnetic fields</a></li></ul> <h2 id="see-also">See also</h2> <ul><li><a href="/facts/Imaginary_line_(mathematics)/2TomQ1SU">Imaginary line (mathematics)</a></li></ul> <h2 id="external-links-and-references">External links and references</h2> <ul><li><a href="https://www.infoplease.com/world/geography/world-geography-glossary">World Geography Glossary</a></li></ul> <h2 id="references">References</h2> <ol> <li id="fn:1"><p>Rosenberg, Matt (January 26, 2020). "Major Lines of Latitude and Longitude on a World Map". <a href="https://www.thoughtco.com/equator-hemisphere-tropic-of-cancer-capricorn-1435089" target="_blank">https://www.thoughtco.com/equator-hemisphere-tropic-of-cancer-capricorn-1435089</a> <a href="#fnref:1" class="footnote-back-ref">↩</a></p></li> </ol>