A monochromatic laser beam is a type of laser that emits light of a single wavelength or color. This means that all of the photons in the beam have the same energy and frequency.
A polychromatic laser beam is a type of laser that emits light of multiple wavelengths or colors. This means that the photons in the beam have different energies and frequencies.
A monochromatic laser beam is created using a laser medium, such as a crystal or gas, that amplifies the light of a specific wavelength. The light is then reflected back and forth between two mirrors, creating a strong, coherent beam of light with a single wavelength.
Monochromatic laser beams have a high level of coherence and a narrow beam width, making them useful for precision applications such as surgery, spectroscopy, and holography. They also have a well-defined color, making them useful for color-sensitive applications, such as printing and laser displays.
Polychromatic laser beams have a wider range of wavelengths, allowing them to be used for a variety of applications, such as cutting, welding, and material processing. They also have a higher power output compared to monochromatic lasers, making them more suitable for industrial applications.