Why should you not hold thermometer by Its bulb
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If you hold a thermometer by the bulb, the heat from your fingers alters the reading and the temperature of your hand affects the reading of the thermometer.
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A thermometer bulb carries Mercury who measures the temperature of the body.
This Mercury is very reactive towards even the little heat.
Hence, we should not have to hold a thermometer by bulb to read its temperature. Holding the bulb will leads to temperatute variation because of heat in fingers.
This Mercury is very reactive towards even the little heat.
Hence, we should not have to hold a thermometer by bulb to read its temperature. Holding the bulb will leads to temperatute variation because of heat in fingers.
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