GENERAL KNOWLEDGE

Detailed explanation-1: -A laser generates a beam of very intense light. The major difference between laser light and light generated by white light sources (such as a light bulb) is that laser light is monochromatic, directional and coherent. Monochromatic means that all of the light produced by the laser is of a single wavelength.

Detailed explanation-2: -Because laser light is: Monochromatic-It contains only one specific wavelength and hence one color. Coherent-The motion of all photons is coordinated. Directional-The laser beam is very narrow, concentrated and therefore, it is a high intensity source.

Detailed explanation-3: -Lasers generate coherent, monochromatic light in many wavelengths, both visible and invisible, depending on the type of laser. The property of coherence makes lasers very different than typical light sources; and very hazardous to the eyes and/or skin.

Detailed explanation-4: -Laser light is said to be coherent, collimated, and monochromatic. Ordinary light, however, is incoherent, non-collimated, and polychromatic. Coherent means that laser light travels in waves with each other both temporally and spatially and in the same direction.

Detailed explanation-5: -When the incident photon and the emitted photons have the same energy, they will have the same wavelength and frequency. This results in a monochromatic laser light.