Two laser beams can create the illusion of a single point of light when they intersect, but visibility depends on the presence of particles in the air to scatter the light. Without a medium like dust or water particles, the beams remain invisible from the side. The intersection of two beams increases the number of photons available for scattering, enhancing visibility. Techniques using intersecting lasers are employed in advanced 3D displays, either by fluorescing materials in glass or by ionizing air to produce visible light. However, these methods often require complex setups and powerful lasers, limiting practical applications.