Light Absorption Research Paper

Light is a form of energy that behaves in some ways like waves. Light waves have a range of wavelengths. A wavelength is the distance between any point on one wave and the corresponding point on the next wave. Different wavelengths of light appear to us as different colors. Light that contains all wavelengths in the same proportions as sunlight appears white. See LIGHT.

The atom of an element has electrons that are found around the nucleus in regions known as orbitals. When energy is absorbed by the electrons of an atom they begin to jump to higher energy levels. When this happens the electrons are in an excited state. However when the electrons begin to release the energy and drop in energy levels they emit electromagnetic radiation. If the radiation that is emitted falls between 400 to 700 nanometers then the electrons emit photons which we can see as visible light.

The initial experiment was a success. As our treatment group spent more and more time under the lights, the absorbance rate continues to decrease toward zero. Once our 30 minutes were up, the absorbance rate in each tube was significantly lower than at the start of our experiment. In contrast the two control groups did significantly lower the absorbance. Each control lacked one of the vital aspects of photosynthesis, one being light, and the other being chloroplast. Neither of the control groups (Control 1 or 2) showed any signs of photosynthesis. Control 1 was exposed to light, but contained no photosynthetic organelles thus the absorbance throughout the 30 minutes varied minimally, mostly staying stagnant. Control two which contained chloroplast but was not exposed to any light failed to lower the absorbance at all and in fact increased the absorbance over the 30 minutes. However, the treatment group contained both and ultimately performed photosynthesis as we expect therefore, confirming our assumption that chloroplast were the organelles required for photosynthesis in plants and that light is required to perform said photosynthesis. The treatment group, containing both the chloroplast and being exposed to light provided evidence that photosynthesis was taking place as the absorbance lowered at each 10-minute interval. Having a less absorbance would be desired because as DCIP became reduced we would expect the solution to become more and more clear, thus less

This explains why in low lights, such as moonlight, everything appears gray. As Rainwater said “By definition, color includes all aspects of light except variations in time and space.” (98) So color and light go hand in hand with each other “The color you see depends on the intensity and wavelengths of the light that illuminates the object, on the wavelengths of light reflected or transmitted by the object, on the color of the surrounding objects, and on absorption or reflection by substances in the light path” (Rainwater 99) Hue, saturation and brightness refer to the aspects of color. “Hue is the color sensation by which you distinguish the different parts of the spectrum- red, blue, green, yellow, etc.” (Rainwater 101) Saturation appears as the degree of hue in a color. “It is the color sensation by which you distinguish a hue as being pale or rich, weak or strong.” (Rainwater 102) Another one, brightness “Brightness is the primary visual sensation by which you detect the presence of light. It is associated with the quantity of the light and the intensity of the visual sensation.” (Rainwater 103) These refer to just some of the terms associated with color and the human

“About 300 years ago, Sir Isaac Newton saw beam of sunlight through a glass prism. He discovered that light is made up of a spectrum of seven distinct visible colors” (University of Manitoba). Thus known as red, orange, yellow, green, blue, indigo, violet, or roygbiv. These colors come about when electrons jump down from a higher energy level. To do this, a specific amount of energy is absorbed by an specific atom, causing its electrons to jump from ground state to higher energy levels.

For instance, the biggest challenge is likely to be the degradation of our health. As the Earth is now, we still suffer health problems caused by the UV radiation that enters our biosphere right now, before ozone is depleted even more so. The biggest health issue caused by UV radiation is cancer of the skin. Whilst exposure to UV radiation will often allow you to tan, it can be very dangerous because there is a very thin line between exposure and over-exposure and this is where the idea of skin cancer comes from. Exposure to UVB radiation means that it will enter just the top layers of your skin and give you a nice brown tan. However, if you spend too long under the UVB radiation’s source, most commonly the Sun, it will penetrate into your

The methodology for this experiment required a lot of careful measurement and calculations. The procedure consisted of many detailed steps to ensure accuracy when recording measurements. This experiment was carried out in an enclosed, darkened room because the the nature of the experiment requires a controlled temperature. Carrying out eight trials for each color of construction paper was a more accurate way of collecting a large quantity of data. In this experiment there were five groups of material (color) and eight experimental units in each group. There was a total of forty sheets of construction paper used; eight sheets of each of the five colors. The reason for testing five different colors was to determine a trend across the color spectrum in regards to the amount of radiant energy each color is able to absorb.

2. By passing a beam of sunlight through a prism, Newton showed that white light comprised all the visible colors of the spectrum.

It's summer time, school is out and all your kids want to do is head outside and play. While you know that you have to slip, slop, slap on the sunscreen to keep their delicate skin from getting burned, what precautions are you taking to protect their eyes? Following these three tips will help to make sure that your children do not suffer permanent vision loss because of damage caused by being outside.

The light is listed on the visible spectrum. The visible spectrum is made up of violet. Indigo, blue, green, yellow, orange, and red. The spectrum goes in order from 380 mm to 680 mm. It gets higher when you go to the right and smaller when you go to the left.

Ice, like other reflective surfaces, absorbs and reflects light. Different colors of light emits different wavelengths. Lighter colors of light such as red, yellow, and orange have longer wavelengths ranging from 500 nanometers to 700 nanometers. Darker colors such as blue, green, and purple have a shorter wavelength, ranging from 380 nanometers to 500 nanometers. Anything above 700 nanometers are considered infrared and anything below 380 is considered ultraviolet. Ultraviolet lights are so powerful to the point that extensive exposure would knock off electrons from the atom causing alters the DNA. Light is a form of electromagnetic radiation and is produced in wavelengths. Photons excites atoms causing them to vibrate, the vibration that the photon causes in the atom is what we consider heat.

Two chemicals react to form an excited, high-energy, intermediate. This intermediate breaks down releasing some of its energy as photons of light in order to return to its desired “ground” state. Photons are essentially particles that transmit light (see figure 1). The mechanism can be shown like the following: A + B  AB*  Products + Light (Welsh). Figure 1- Movement between electron shells To achieve the color of choice, many different dyes are used. The structure of the molecule determines the exact energy of the light given off, resulting in a corresponding color.

For Radical Light, choreographer Salva Sanchis enters into dialogue with the music of Senjan Jansen and Joris Vermeiren. Under the name Discodesafinado, these two sound designers fuse minimal techno with experimental electronics, creating a wonderful pointillist palette of micro-sounds,both rhythmic and contemplative, incomprehensible and infectious.

Strictly speaking, blue is nothing but light that is reflected off the surface of an object and into receivers. These receivers then send electrical impulses to the brain that then interprets the impulses as blue. In that case, what more is color other than the interpretation of electrical signals? Without the stimuli and the receiver, there would be no color. In that case, color is only defined by the measurement of something else. A scientific approach to seeing color reveals a puzzling explanation.

With today’s science, light becomes more specifically perceived as a spectrum. The specific name for this spectrum is the electromagnetic spectrum, which contains many types of waves (NASA, Electromagnetic Spectrum). In Figure 2, the spectrum shows a variety of wavelengths with specific wavelengths classified by its length. The range of wavelengths humans can see wavelengths that are around 400 – 700 nanometers (nm) as colors while all other electromagnetic waves are simply blind to humans. The interesting classes for light that are used to measure are microwave and infrared light. The laser is