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<html><body><h2 id="content-id-8705694312-2"><b>GK Questions Overview</b></h2><p>GK Questions have a good weightage in the Ssc Cgl Exam and the type of question asked in Ssc Cgl exam is similar to the question mentioned below. It has been solved and explained by KD Live Experts under the guidance of Neetu Mam and they have tried to elaborate the concept used in GK Questions.</p><h2 id="content-id-6431957802-3"><b>Question On GK </b></h2>'Red' is used as a danger signal because
<div class="row show--dificulty--bar" style="margin-top:8px;"><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex !important;border-right:0.1px solid #eee;"><h3 style="font-size:12px !important;">Difficulty : Moderate </h3></div><div class="col-sm-6 show--dificulty--bar" style="display:inline-flex;"><h3 style="font-size:12px !important;"> Average Time : 28 Seconds </h3></div></div><h2 id="content-id-7930615842-4"><b> GK Questions Options</b></h2><ol><li><p>Blood is red</p>
</li><li><p>red light is scattered least by the air molecules </p>
</li><li><p>red colour is easily available</p>
</li><li><p>red colour is soothing for the eye.</p>
</li></ol> <h2 id="content-id-8325671049-5"><b> GK Questions Solution</b></h2><p>'Red' is used as a danger signal because red light is scattered least by the air molecules.</p>

<p>When the light passes through atmosphere, it gets scattered by small air particles. The scattering of light is inversely proportional to the fourth power of its wavelength.</p>

<p>As the red light has the highest wavelength among all the colours, so it is scattered the least. Due to which most of the light gets reflected back and can travel longer distances through rain, fog, dust etc. to reach our eyes effectively.</p>
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