The white light or daily light is a mixture of different length of waves. White light is a mixture of many colors which can be separated.
Red light has long waves whereas blue light has short waves.
The waves making up a laser beam are quite different. Laser beams can be concentrated into a tiny point. They have trementous energy. They are accurate cutting tools that can even cut diamond, the hardest substance known to man. Laser beams are powerful enough to cut through metal in military operations, a laser beam can be bounced off a target such as an enemy airplane or ship to determine its distance and speed.