Mechanical waves require a medium to travel through. Examples of mechanical waves are sound waves, water waves, a vibrating string. (See related link). Electromagnetic waves â¦(such as light, radio waves, X-rays, microwaves) do not need a medium to travel through, so these are not mechanical waves.
Photostat definition, a camera for making facsimile copies of documents, drawings, etc., in the form of paper negatives on which the positions of lines, objects, etc., in the originals are maintained. a copy made with this camera.
From Wikipedia, the free encyclopedia. Photostatins are inhibitors that can be switched on and off in vivo by visible light, to optically control microtubule dynamics. Photostatins are a form of photodynamic therapy. As a cell prepares to divide, its microtubules, arrange themselves into a spindle that permits its chromosomes to split into two bundles.