A white and smooth surface is a poor absorber of heat and a good reflector. It reflects most of the incoming light and heat, minimizing absorption and thus remaining cooler.
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Air conditioners control both temperature and humidity, air coolers primarily cool the air through evaporation and do not effectively control humidity.
A thermometer suitable for measuring 2000 °C is a total radiation pyrometer. These devices are designed to measure extremely high temperatures by detecting the thermal radiation emitted by an object, making them ideal for temperatures far beyond the range of ...
When sealed biscuits are kept inside the refrigerator, they become crispy because the humidity inside the refrigerator is generally low, which helps absorb excess moisture from the biscuits. This drying effect restores their crispiness.
In winter, two thin shirts provide more comfort than one thick shirt because the layer of air trapped between the two shirts acts as an insulating medium. This air layer reduces heat loss from the body, keeping it warmer.