Do you know how many colors laser has?

A laser is also a kind of light. When sunlight passes through a high powered laser, it breaks up into seven colors of the rainbow, right? This is because sunlight, lights and candles have different wavelengths, phases and directions of light. Because it's disjointed, the light gets wider and doesn't reach very far.
Lasers, on the other hand, artificially adjust the wavelength and phase of this light. As a result, light does not diffuse and can be transmitted over great distances while retaining its energy. In other words, it's a controlled, energy-intensive light created by the human hand. Not only medical, but also stage lighting, such as metal welding, by changing the energy, has been used in various fields for demonstrating laser pens for ten days and laser stage lights for ten days.