Ray and Beam.
Ray | Beam |
A ray is a concept widely used in optics,ray is an idealized narrow beam or a column of light. | Beam is a narrow projection of a set of particles or waves.collection of rays |
A ray cannot be observed physically and has a zero width. | Beam has a finite width,and it can be observed physically. |
Rays are discussed under light . | Beams are discussed in both waves and particles and possess properties such as wavelength,amplitude and phase. |