As the slits increased during the laser part of the experiment, the slits decreased. Light is a constant source that is seen in everyday life. Theories about what it exactly is, have been tossed around for a long time. Waves are the fashion by which energy is transmitted in the universe. Holograms can be made from white light because white light is the standard form of light.
White light is what all other forms of light come from.
And also, white light is the fastest moving form of light in the universe and also is the most seen. A screen with a piece of paper is attached to the other end of the laser. Geometrical Optics Lenses are used in everyday life. They are the glasses that we wear, the telescope we view the stars and distant galaxies with, and the camera that captures precious moments. Atoms can be differentiated by their spectrum, much like fingerprints in people.