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During very cold weather conditions, cricket players prefer to wear white woolen sweaters rather than coloured woolen sweaters. The reason is that white wool comparatively : 1. Absorbs less heat from body 2. Emits less heat to the atmosphere Which of the above statements is/are correct? (a) 1 only (b) 2 only (c) Both 1 and 2(d) Neither 1 nor 2 |
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Answer» (b) 2 only As white colour reflect the solar radiation and absorb the infrared radiation. In winter season as body temperature is more than atmospheric temperature. Body radiate heat in infrared region which is not visible un is absorbed by sweater of white colour but it emit the same inless amount to the surrounding. Due which human body remain hot. Here, white colour absorb the infrared radiation from outside and keep the body hot. |
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