{"id":917,"date":"2025-05-08T15:01:33","date_gmt":"2025-05-08T15:01:33","guid":{"rendered":"https:\/\/yaveni.com\/blog\/?p=917"},"modified":"2025-05-08T15:01:33","modified_gmt":"2025-05-08T15:01:33","slug":"comparing-with-the-same-object-painted-in-silvery","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/comparing-with-the-same-object-painted-in-silvery\/","title":{"rendered":"Comparing with the same object painted in silvery"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Comparing with the same object painted in silvery, object painted in BLACK absorbs heat <strong><em><strong>(a)<\/strong><\/em><\/strong> and emits heat <strong><em><strong>(b)<\/strong><\/em><\/strong>. *<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A (a): slower ; (b): slower<br>B (a): faster ; (b): slower<br>C (a): faster ; (b): faster<br>D (a): slower ; (b): faster<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Correct Answer: C \u2014 (a): faster ; (b): faster<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">When comparing how different surfaces absorb and emit heat, <strong>color and surface texture<\/strong> play crucial roles due to their impact on thermal radiation. Black and silvery (or shiny) surfaces have significantly different thermal properties.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>1. Heat Absorption:<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">Black surfaces absorb <strong>more heat<\/strong> than silvery or reflective surfaces. This is because black objects absorb all wavelengths of light and convert them into heat, whereas shiny or silvery surfaces <strong>reflect most of the incoming radiation<\/strong>. This principle is why black cars feel hotter in the sun than silver ones, and why solar panels are often black \u2014 to maximize heat or energy absorption.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2. Heat Emission:<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The ability of an object to emit heat is called <strong>emissivity<\/strong>. Black objects also emit heat <strong>more efficiently<\/strong> than shiny ones. A black surface has a high emissivity (close to 1), meaning it emits thermal radiation well. In contrast, a silvery or reflective surface has a <strong>low emissivity<\/strong> (closer to 0), so it retains heat rather than emitting it. That\u2019s why thermal flasks or space blankets often have shiny inner linings \u2014 to <strong>minimize heat loss<\/strong> by radiation.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Conclusion:<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">A black-painted object absorbs heat <strong>faster<\/strong> because it takes in more radiant energy. It also emits heat <strong>faster<\/strong> because it radiates thermal energy more efficiently. In contrast, a silvery-painted object does both more slowly due to high reflectivity and low emissivity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Thus, <strong>Option C<\/strong> is the correct choice:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>(a): faster<\/strong> \u2013 black absorbs heat quickly.<\/li>\n\n\n\n<li><strong>(b): faster<\/strong> \u2013 black also emits heat more rapidly.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Comparing with the same object painted in silvery, object painted in BLACK absorbs heat (a) and emits heat (b). * A (a): slower ; (b): slowerB (a): faster ; (b): slowerC (a): faster ; (b): fasterD (a): slower ; (b): faster The correct answer and explanation is : Correct Answer: C \u2014 (a): faster ; [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[],"tags":[],"class_list":["post-917","post","type-post","status-publish","format-standard","hentry"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/917","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=917"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/917\/revisions"}],"predecessor-version":[{"id":918,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/917\/revisions\/918"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=917"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=917"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=917"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}