Air is made up mostly of nitrogen and oxygen molecules that are spread too thinly to affect light noticeably by, say, altering its colour or intensity. Even so, air’s presence is revealed in hot weather through the shimmering effect called ‘heat haze’. This is the result of the heat causing fluctuations in the density of the air, which in turn affects its optical properties.
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Air is a mixture of gases.
Air is made up mostly of nitrogen and oxygen molecules that are spread too thinly to affect light noticeably by, say, altering its colour or intensity. Even so, air’s presence is revealed in hot weather through the shimmering effect called ‘heat haze’. This is the result of the heat causing fluctuations in the density of the air, which in turn affects its optical properties.
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