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.
Familial emphysema: Introduction. Emphysema caused by genetic factors rather than smoking. Emphysema is lung damage which is mostly caused by smoking but in familial emphysema it is caused by the lack of the AAT enzyme which protects the elastin of the lung alveoli. ...more Â».mphysema is lung damage which is mostly caused by smoking but in familial emphysema it is caused by the lack of the AAT enzyme which protects the elastin of the lung alveoli. ... more Â».