Cancer that has spread to the lungs may not cause any symptoms or it may cause. 1  A cough that doesn't go away. 2  Shortness of breath. 3  Chest infections. 4  A build up of fluid between the chest wall and the lung called a pleural effusion â this in turn causes shortness of breath, chest aching, discomfort and heaviness.ancer that has spread to the lungs may not cause any symptoms or it may cause. 1  A cough that doesn't go away. 2  Shortness of breath. 3  Chest infections. 4  A build up of fluid between the chest wall and the lung called a pleural effusion â this in turn causes shortness of breath, chest aching, discomfort and heaviness.
A laser is a coherent and focused beam of photons; coherent, in this context, means that it is all one wavelength, unlike ordinary light which showers on us in many wavelengths. The acronym laser stands for light amplification by stimulated emission of radiation.. Lasers work as a result of resonant effects. The output of a laser is a coherent electromagnetic field. In a coherent beam of electromagnetic energy, all the waves have the same frequency and phase.
12 definitions of LASER. Meaning of LASER. What does LASER stand for? LASER abbreviation. Define LASER at AcronymFinder.com