Light Intensity of Incoherent Lights

Organisms that use the process of photosynthesis to create sugar to use for energy have a greater rate of photosynthesis when the intensity of the light source is the greatest. If light is far away from the leaves of a plant, for example, then it takes more time for the light to be absorbed and used in photosynthesis. When it takes more time for the light to reach the leaves, the rate of photosynthesis decreases. As the light intensity increases, I would expect the rate of photosynthesis to increase as well. Therefore, I would expect that when the Elodea is closest to the light bulb, the rate of photosynthesis would be the greatest. My hypothesis would be: If light intensity affects the rate of photosynthesis, and the rate of photosynthesis is measured using the amount of

Light is said to be the portion of the electromagnetic spectrum that all people can see. Many people call this portion visible light, and know that visible light has a range of many colors. These main colors are usually said to be red, orange, blue, indigo, violet, yellow, and green. The colors of different objects are determined by the interaction between light and the electrons of the atoms that make up an object. The object is made up of specific wavelengths of white light unique to the object, and it absorbs the light according to its wavelengths. Molecules have many states, two of these states, are states where the electron is excited and neutral when it is originally found. Molecules and atoms can only absorb light when the energy of a photon matches the energy difference between these two states.

Beer’s Law is a direct liner relationship between the absorbance of light are a selected wavelength and the concentration the absorbing species in the solution. (Sullivan 241). Beer’s Law shows a relationship between several concentrations. To determine if the determine our data consistent with Beer’s law, we will plot a graph of absorbance versus concentration with a linear regression

An investigation to measure the percentage light transmission, using a colorimeter, through a solution, from pH 2 – pH 9, in which jelly cubes were immersed over a 24 hour period

This report will discuss the advantages, disadvantages and details of both natural daylight and artificial lighting systems in terms of developing within a commercial property. The report provides detailed research and analysis concerning the subject topic in order to give a comprehensive view of various lighting types and methods. Light is an electromagnetic radiation visible to the human eye, the wavelengths visible to humans range between 380nm (nanometers) to 740nm. Light behaves as a wave - it undergoes reflection, refraction, and diffraction just like any wave would.

14. Different levels of brightness are due to different levels of heat, and different distances.

It was later on discovered that photosynthesis occurs in the only green portion of the plants, also known as chloroplasts. When more research was done within these chloroplasts, it was found that pigments, which are molecules that absorb only certain light wavelengths, have colors because we see the wavelength they reflect, rather than absorb. (Fountain, 2013). To determine which colors would be absorbed and which would be reflects, biologists used wavelengths to determine the type of electromagnetic radiation. This is known as the Electromagnetic Spectrum. The Electromagnetic Spectrum shows a variety of wavelengths, measured in nm. These wavelengths have a different color assigned to each, ranging from purple at 400 nm to red at 710 nm (Freeman, 2011).

The purpose of this lab was to see which level of light (measured in lux) made Spinacia oleracea (Spinach) leaf disks float the fastest. Our hypothesis was that an increase in light intensity will decrease the time it takes Spinacia oleracea disks to float. If light intensity is increased, then the time it takes Spinacia oleracea disks to float will be decreased. The mean for the no light (0 Lux) sample and the low light (4 x100 Lux) sample was 1200 seconds with no standard deviation because none of the disks in these two samples floated. The mean and standard deviation for the medium light (110 x100 Lux) was 902 seconds +- 84 seconds. The mean of the high light sample (410 x 100 Lux) was 692 seconds with no standard deviation because only two Spinacia oleracea disks floated so there was no need to measure the variability of the data. The final results indicated that the highest light intensity led to the quickest rise of Spinacia oleracea disks, supporting our hypothesis.

B & H Foto & Electronics Corp. (2013). Lighting Studio. Retrieved September 1, 2013, from bhphotovideo.com: http://www.bhphotovideo.com/c/browse/Lighting-Studio/ci/1161/N/4294551176

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.

The third simulation is loss location (-9, -9). First f all, this test has error in one location. It is showing 28dB, this value is impossible. The reason is we haven't set program can detect value more than 27dB. This mistake may program error or test error. Compare with last two tests, this test is inaccuracy because many abnormal values are showing in SITA results. The normal values are higher frequency implements. The lowest has showing very abnormal value that is 14dB. This value should not possible shows in this test. The reason cause those errors may program error or test error. The reason is program using the computer vision technology, but the problem is image noise. The technology cannot guarantee all of flashlight can be detected.

In the Charles Franklin’s non fiction article entitled “Is it Right to Break Light Law,” he states that breaking the law can be right and wrong, but the fact that the person(s) stood for what they believed in. The author supports his claim by giving the the example of a teachers union that went to strike but in the state it is illegal for employees to strike. The author next proceeds to state that there is lawful instruments to legally “fight” the law. Finally, the author states that breaking the law is breaking the law. Breaking the law is wrong and the only thing that is right is a moral right against the law. Franklin's purpose is to show that breaking the law wrong in order to show that morality overthrows any law.

Everyone has experienced warmth by sunlight. In this science fair project i will determine how the color of an object affects the amount of radiant energy absorbed.

PURPOSE: The aim of the investigation was to further our understanding of the physical laws that govern our ability to receive and interpret information in the form of visible light. We have all had a physics class that at least brushed the introduction of optics, but we can still further our comprehension by experimenting with optics that have different characteristics. Does one axis truly get inverted when viewing an object through a lens? How significant of an effect does human error have in calculating reflection (if any)? How much does magnification blur an image viewed through an optic? How much does the angle of light deflect from a change of medium?

For years, infrared LED has been merely a system for piping light around corners and into the inaccessible places to allow the hidden to be lighted. But now, infrared LED has evolved into a system of significantly greater importance and use. Throughout the world, it is now being used to transmit voice, television and data signals as light waves. Its advantages as compared with conventional coaxial cable or twisted wire pairs are manifold. As a result, millions of dollars are being spent to put these light wave communication systems into operation.