LASER light has several applications like metal cutting, welding, printing, surgeries, fiber optics, optical computing devices, etc. Ordinary light is used for illumination of area. In LASER light, the energy is concentrated in a narrow area. LASER light can damage the damage the eyes if looking with the naked eyes.įor the ordinary light, the energy is distributed in a wide area. Ordinary light normally does not harm the human eyes. Therefore, it can be focused on a sharp point. Therefore, it cannot be focused on a sharp point.Īs the LASER light is highly directional. Ordinary light is an inconsistent light because it does not contain photons of the same frequency.Īs the ordinary light is diffused. The decrease in the intensity of the LASER light is not significant over very long distances. The intensity of the ordinary light significantly decreases with the distance as it travels. LASER light can travel to large distances and for long duration. Ordinary light can travel only to the short distances and for short duration of time. The coherence length of the LASER light is of the order of kilometers. The coherence length of the ordinary light is of the order of few millimeters. That is, its photons are in phase with each other. the photons of the ordinary light are out of phase. Ordinary light is an incoherent light, i.e. it travels in different directions randomly. LASER light has very narrow frequency range. Ordinary light involves a wide range of frequencies. That is, it is a mixture of different colors. LASER light involves a stimulated emission of radiation. Ordinary light involves a spontaneous emission of radiation. These differences between ordinary light and LASER light are given in the following table − Basis of DifferenceĪ mixture of electromagnetic radiations of different wavelengths is called ordinary light.Ī type of light that is produced by the stimulated emission and has electromagnetic waves of one wavelength is called LASER light. Difference between Ordinary Light and LASER Lightīoth ordinary light and LASER light are forms of electromagnetic radiation, however they are different in many ways. The LASER light is used in several specialized applications like laser diode, laser beam welding, laser drilling, laser cooling, etc. The LASER light has several unique feature such as directionality monochromatic, coherent, and narrow range of frequency, etc. The LASER light have photons that are in phase, therefore it is a coherent light. The LASER light is produced by using the concept stimulated emission, given by Albert Einstein. Therefore, LASER light is a type monochromatic light, i.e. A LASER light is a form of electromagnetic radiation having only one wavelength of electromagnetic wave and is coherent light. LASER stands for Light Amplification by Stimulated Emission of Radiation. The common practical examples of ordinary light are sunlight, light produced by different types of artificial lamps like incandescent lamp, tungsten filament lamp, fluorescent lamp, etc. For this reason, it is also an incoherent light. The ordinary light does not have relation between the phases of its photons. The ordinary light is divergent, which means it can travel in all the directions randomly. As the ordinary light is a mixture of different wavelengths, thus it is a polychromatic light. Other differences between ordinary light and LASER light are listed in the table given below.Īn ordinary light is the type of electromagnetic radiation having many wavelengths and is incoherent light. One major difference is that the ordinary light has a mixture different wavelength whereas the LASER light is monochromatic, i.e. However, there are several differences between an ordinary light and LASER light. Ordinary light and LASER light are both forms of electromagnetic waves, hence they can travel at the same speed, i.e., speed of light, in vacuum.
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