Essay about The Laser

Here, a laser of specific wavelength is targeted on a particular area of the skin. The light from the laser beam is absorbed by the flawed outer layer of the skin and results in its vaporization. With the removal of the outer layer, the new, healthier underlying skin develops.

The electromagnetic spectrum is the range of wavelengths over which electromagnetic radiation extends (Merriam-Webster Dictionary). The visible part of the spectrum is light and we can see colors from blue to red. On the left side of the spectrum is blue where the wavelength is shorter. On the right side of the spectrum is red where the wavelength is much longer than the blue end. These wavelengths are called the visible spectrum and an example of this is a rainbow. For a light wave to be absorbed by an object, the single frequency light wave must come in contact with the object. Although light colors reflect part of the visible light, black absorbs all energy and wavelengths.

Light waves are a form of electromagnetic waves, which consist of patterns of electric and magnetic energy. The visible spectrum is only a small part of the electromagnetic spectrum-the

Optical Drive: uses lasers to read or write data to/from optical discs like CDs or

The base of the light triangle, b, was measured first. Then, the light positions, a, were measured f=or the first order (m=1) and second order (m=2) light beams to determine the angle Ɵ for each. This data was organized in an Excel table and used to find the wavelength, λ, of the laser through Equation 1. This value was then compared to the theoretical value for wavelength of the laser, which was 6.328x〖10〗^(-7)m, and the percent error was calculated between the two.

Light is a type of energy. Light behaves like a wave because it acts as a disturbance in the magnetic and electric field of space. Light can behave as a particle, because it sends all its energy to one place. A particle of light is called a photon. Photons can be absorbed into objects, bounce

An Excimer Laser is an extremely precise laser that uses ultraviolet light to remove minute amounts of corneal tissue. Each pulse of the laser removes mere microns of tissue, far less

The word laser is an acronym for, “Light Amplified by Stimulated Emissions of Radiation”, this means that all the lights in a laser have the same wavelength. Within a century of the laser being invented it occupied a major role in scientific research, medicine, industry, and even daily life. Lasers are used in the medicine field for procedures such as, laser eye surgery, heart, stomach, and intestinal surgeries. These procedures laser procedures are said to be harmless. Major factory industries use lasers to cut many things ranging from thin

In the experiment, Luminol Synthesis and Chemiluminescence, the purpose is to create luminol using the base-mediated reduction of 5-nitro-2,3,-dihydrophthalazine-1,4-dione and to investigate the chemiluminescence reaction that luminol is known for. 5-nitro-2,3-dihydrophthalazine-1,4-dione was reduced using sodium hydrosulfite in a solution of sodium hydroxide under reflux conditions. Acetic acid was used to precipitate the solid luminol product, later the product was collected through vacuum filtration. The luminol product emitted a blue light when a dilute solution of it and sodium hydroxide was mixed with a dilute hydrogen peroxide and potassium ferricyanide solution. The blue light seen correlates to the excited molecules that are dropping

How does it work? Glow sticks produce light using a process known as chemiluminescence. Chemiluminescence is the production of light energy from a chemical reaction without the use of heat or a flame.

Light can be produced in many different ways, including incandescence, phosphorescence, and fluorescence (Gunderman 1). Incandescence is when heat makes an object release light, like the filament in a light bulb. Phosphorescence is when a material absorbs energy and then releases it slowly over time, like glow-in-the-dark toys. Fluorescence is when a material absorbs energy and releases it quickly as light (Gunderman 1). Fluorescence is the process used in glow sticks (Science Fair Projects 1). The fluorescent dye in this experiment’s glow sticks released yellow light. Different color glow sticks are made with different dyes (Harris 2).

Encyclopedia Britannica tells us that the interaction between these particles is crucial to the formation of the lights.

During the cold winter of 1895, a German scientist by the name of Wilhelm Conrad Roentgen was working with a cathode-ray tube when he noticed nearby crystals were glowing. When Roentgen reached for the crystals he was amazed when the shadow cast on the crystal was not of his whole hand, but just his bones. Roentgen covered the tube with heavy black paper and saw that the crystals still glowed and the shadow of his hand bones still shown through, he then determined that a new ray was being emitted that could penetrate through thick materials. (1.) He later found that the rays could pass through most anything, but would cast a shadow of solid objects; these shadows could then be captured on film. Among the solid objects Roentgen shot with

Though the guns used in commercially played laser tags have lasers they are not used in actual mechanism of the game, they actually use infrared to register hits. Infrared has its own cool properties such as it gets scattered in very short

causing it to give off photons. The principle is the same as it was with