In telecommunications, laser can replace electrical transmission over traditional copper wires, but laser beams are easily unfavorably interfered by external conditions, such as rain, fog, and clouds.

• 在通讯方面；雷射可取代在传统铜线上的电子传输；不过雷射光束极易受到外在状况不利的干扰；例如雨水；雾气和云层.