caption: Rays A ray is a line along which the wave travels.
exif: {"Image DocumentName": "Rays A ray is a line along which the wave travels.", "Image ImageDescription": "All the rays for the type of linearly polarized waves that have been discussed are parallel. The collection of waves is called a plane wave. A surface connecting points of equal phase on all waves, called the wave front, is a geometric plane. A surface connecting points of radiation sends waves out radially in all directions. A surface connecting points of equal phase for this situation is a sphere. This wave is called a spherical wave. Section 34.3.", "Image XResolution": "37", "Image YResolution": "37", "Image ResolutionUnit": "Pixels/Centimeter", "Image Software": "SlidePlayer", "Image YCbCrPositioning": "Centered"}