wavelength waveÂ·length (wÄv'lÄngkth', -lÄngth') n. Symbol Î» The distance between one peak or crest of a wave of light, heat, or other energy and the next corresponding peak or crest.
Causes: Emphysema: The number one cause of emphysema is smoking. Other contributing factors in its development or exacerbation (increase in severity) include long-term exposure to other lung irritants, such as air pollution, chemical fumes, or dust.
Cigarette smoke also causes inflammation and irritation in the lungs leading to an increase in mucus production. Too much mucus in the lungs places you at an increased risk for lung infections, as mucus provides bacteria with the perfect hide-away. Air pollution also plays a role in the development of emphysema.