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.
Photoworks is a visual arts agency for photography, based in Brighton, England and founded in 1995. It commissions and publishes new photography and writing on photography; produces exhibitions, books, participation and learning projects and events including the Brighton Photo Biennial, the UK's largest photography festival.