{"id":87274,"date":"2025-06-01T06:39:06","date_gmt":"2025-06-01T06:39:06","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87274"},"modified":"2025-06-01T06:39:06","modified_gmt":"2025-06-01T06:39:06","slug":"to-a-perpendicular-to-the-plane-of-ecliptic-earths-axis-of-rotation","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/to-a-perpendicular-to-the-plane-of-ecliptic-earths-axis-of-rotation\/","title":{"rendered":"To a perpendicular to the plane of ecliptic, Earth’s axis of rotation"},"content":{"rendered":"

To a perpendicular to the plane of ecliptic, Earth’s axis of rotation makes an angle of 23\u00bd degrees. Had this angle been zero degree, which one among the following would result ?
\nA) There would have been no season
\nB) The length of day and night would have been the same throughout the year
\nC) The length of the day and night would have been the same all over the earth
\nD) All of the above<\/p>\n

[amp_mcq option1=”There would have been no season” option2=”The length of day and night would have been the same throughout the year” option3=”The length of the day and night would have been the same all over the earth” option4=”All of the above” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2015<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
If Earth’s axis of rotation made an angle of zero degrees with the perpendicular to the plane of the ecliptic, it would mean the axis is perpendicular to the orbital plane. This configuration would eliminate the tilt that causes seasons. With no tilt, the sun’s rays would be directly overhead at the equator throughout the year. Consequently, every point on Earth would experience approximately 12 hours of daylight and 12 hours of darkness every day of the year, and there would be no significant seasonal variations in temperature or day length at any given latitude.<\/section>\n
The tilt of Earth’s axis of rotation (currently 23.5 degrees) is the primary cause of seasons, varying day lengths throughout the year at latitudes away from the equator, and varying angles of incidence of solar radiation.<\/section>\n
A zero-degree tilt would mean the terminator (the line separating day from night) would always pass through the poles. This would result in uniform day\/night lengths of 12 hours everywhere on Earth throughout the year and the absence of distinct seasons.<\/section>\n","protected":false},"excerpt":{"rendered":"

To a perpendicular to the plane of ecliptic, Earth’s axis of rotation makes an angle of 23\u00bd degrees. Had this angle been zero degree, which one among the following would result ? A) There would have been no season B) The length of day and night would have been the same throughout the year C) … <\/p>\n

Detailed SolutionTo a perpendicular to the plane of ecliptic, Earth’s axis of rotation<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1093],"tags":[1443,1215,1106],"class_list":["post-87274","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1443","tag-earth-concepts","tag-world-and-physical-geography","no-featured-image-padding"],"yoast_head":"\nTo a perpendicular to the plane of ecliptic, Earth's axis of rotation<\/title>\n<meta name=\"description\" content=\"If Earth's axis of rotation made an angle of zero degrees with the perpendicular to the plane of the ecliptic, it would mean the axis is perpendicular to the orbital plane. This configuration would eliminate the tilt that causes seasons. With no tilt, the sun's rays would be directly overhead at the equator throughout the year. Consequently, every point on Earth would experience approximately 12 hours of daylight and 12 hours of darkness every day of the year, and there would be no significant seasonal variations in temperature or day length at any given latitude. The tilt of Earth's axis of rotation (currently 23.5 degrees) is the primary cause of seasons, varying day lengths throughout the year at latitudes away from the equator, and varying angles of incidence of solar radiation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/to-a-perpendicular-to-the-plane-of-ecliptic-earths-axis-of-rotation\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"To a perpendicular to the plane of ecliptic, Earth's axis of rotation\" \/>\n<meta property=\"og:description\" content=\"If Earth's axis of rotation made an angle of zero degrees with the perpendicular to the plane of the ecliptic, it would mean the axis is perpendicular to the orbital plane. This configuration would eliminate the tilt that causes seasons. With no tilt, the sun's rays would be directly overhead at the equator throughout the year. Consequently, every point on Earth would experience approximately 12 hours of daylight and 12 hours of darkness every day of the year, and there would be no significant seasonal variations in temperature or day length at any given latitude. The tilt of Earth's axis of rotation (currently 23.5 degrees) is the primary cause of seasons, varying day lengths throughout the year at latitudes away from the equator, and varying angles of incidence of solar radiation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/to-a-perpendicular-to-the-plane-of-ecliptic-earths-axis-of-rotation\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:39:06+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"To a perpendicular to the plane of ecliptic, Earth's axis of rotation","description":"If Earth's axis of rotation made an angle of zero degrees with the perpendicular to the plane of the ecliptic, it would mean the axis is perpendicular to the orbital plane. 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The tilt of Earth's axis of rotation (currently 23.5 degrees) is the primary cause of seasons, varying day lengths throughout the year at latitudes away from the equator, and varying angles of incidence of solar radiation.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/to-a-perpendicular-to-the-plane-of-ecliptic-earths-axis-of-rotation\/","og_locale":"en_US","og_type":"article","og_title":"To a perpendicular to the plane of ecliptic, Earth's axis of rotation","og_description":"If Earth's axis of rotation made an angle of zero degrees with the perpendicular to the plane of the ecliptic, it would mean the axis is perpendicular to the orbital plane. This configuration would eliminate the tilt that causes seasons. With no tilt, the sun's rays would be directly overhead at the equator throughout the year. Consequently, every point on Earth would experience approximately 12 hours of daylight and 12 hours of darkness every day of the year, and there would be no significant seasonal variations in temperature or day length at any given latitude. The tilt of Earth's axis of rotation (currently 23.5 degrees) is the primary cause of seasons, varying day lengths throughout the year at latitudes away from the equator, and varying angles of incidence of solar radiation.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/to-a-perpendicular-to-the-plane-of-ecliptic-earths-axis-of-rotation\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:39:06+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/to-a-perpendicular-to-the-plane-of-ecliptic-earths-axis-of-rotation\/","url":"https:\/\/exam.pscnotes.com\/mcq\/to-a-perpendicular-to-the-plane-of-ecliptic-earths-axis-of-rotation\/","name":"To a perpendicular to the plane of ecliptic, Earth's axis of rotation","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:39:06+00:00","dateModified":"2025-06-01T06:39:06+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"If Earth's axis of rotation made an angle of zero degrees with the perpendicular to the plane of the ecliptic, it would mean the axis is perpendicular to the orbital plane. 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