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.
The most common cause of emphysema is cigarette smoking, although rare forms of emphysema may occur in non-smokers. Emphysema may be present with other lung diseases, such as chronic bronchitis and asthma.Like emphysema, these diseases are made worse by cigarette smoking.Emphysema and chronic bronchitis are often grouped together and commonly called chronic obstructive pulmonary disease (COPD). Exposure to air pollution and noxious particles or gases could also cause or worsen these conditions.he most common cause of emphysema is cigarette smoking, although rare forms of emphysema may occur in non-smokers. Emphysema may be present with other lung diseases, such as chronic bronchitis and asthma.