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.
Emphysema is an irreversible condition in which air becomes trapped in the lungs, making it difficult to exhale.Emphysema is a type of chronic obstructive pulmonary disease (COPD), and the most common cause is smoking.Emphysema occurs when the tiny air sacs in the lungs, through which oxygen is transferred to the body, are damaged and eventually destroyed.mphysema is an irreversible condition in which air becomes trapped in the lungs, making it difficult to exhale.