+234 813 0686 500
+234 809 3423 853
info@grossarchive.com

EFFECTS OF ELECTROMAGNETIC RADIATION ON EARTH

  • Type:Project
  • Chapters:5
  • Pages:58
  • Methodology:Scientific
  • Reference:YES
  • Format:Microsoft Word
(Geophysics Project Topics & Materials)
The aim of this work is to describe various form and sources of electromagnetic radiation and its effect on earth.

INTRODUCTION
Electromagnetic radiation (EM radiation or EMR) is a fundamental phenomenon of electromagnetism, behaving as waves and also as particles called photons which travel through space carrying radiant energy. In a vacuum, it propagates at the speed of light, normally in straight lines. EMR is emitted and absorbed by charged particles. As an electromagnetic wave, it has both electric and magnetic field components, which synchronously oscillate perpendicular to each other and perpendicular to the direction of energy and wave propagation.

In classical physics, EMR is produced when charged particles are accelerated by forces acting on them. Electrons are responsible for emission of most EMR because they have low mass, and therefore are easily accelerated by a variety of mechanisms. Quantum processes can also produce EMR, such as when atomic nuclei undergo gamma decay, and processes such as neutral pion decay.
EMR carries energy—sometimes called radiant energy—through space continuously away from the source (this is not true of the near-field part of the EM field). EMR also carries both momentum and angular momentum. These properties may all be imparted to matter with which it interacts. When created, EMR is produced from other types of energy and it is converted to other types of energy when it is destroyed.

The electromagnetic spectrum, in order of increasing frequency and decreasing wavelength, can be divided, for practical engineering purposes, into radio waves, microwaves, infrared radiation, visible light, ultraviolet radiation, X-rays and gamma rays. The eyes of various organisms sense a relatively small range of frequencies of EMR near and including the visible spectrum or light. Visible light is that part of the spectrum to which human eyes respond. Higher frequencies (shorter wavelengths) have more energy in the photons, according to the well-known law E=hν, where E is the energy per photon, ν is the frequency carried by the photon, and h is Planck's constant. A single gamma ray photon carries far more energy than a single photon of visible light.

The photon is the quantum of the electromagnetic interaction, and is the basic constituent of all forms of EMR. The quantum nature of light becomes more apparent at high frequencies (thus high photon energy). Such photons behave more like particles than lower-frequency photons do.

Electromagnetic waves in free space must be solutions of Maxwell's electromagnetic wave equation. Two main classes of solutions are known, namely plane waves and spherical waves. The plane waves may be viewed as the limiting case of spherical waves at a very large (ideally infinite) distance from the source. Both types of waves can have a waveform which is an arbitrary time function (so long as it is sufficiently differentiable to conform to the wave equation). As with any time function, this can be decomposed by means of Fourier analysis into its frequency spectrum, or individual sinusoidal components, each of which contains a single frequency, amplitude, and phase. Such a component wave is said to be monochromatic. A monochromatic electromagnetic wave can be characterized by its frequency or wavelength, its peak amplitude, its phase relative to some reference phase, its direction of propagation, and its polarization.

Electromagnetic radiation is associated with EM fields that are free to propagate themselves without the continuing influence of the moving charges that produced them, because they have achieved sufficient distance from those charges. Thus, EMR is sometimes referred to as the far field. In this language, the near field refers to EM fields near the charges and current that directly produced them, as for example with simple magnets and static electricity phenomena. In EMR, the magnetic and electric fields are each induced by changes in the other type of field, thus propagating itself as a wave. This close relationship assures that both types of fields in EMR stand in phase and in a fixed ratio of intensity to each other, with maxima and nodes in each found at the same places in space.

The effects of EMR upon biological systems (and also to many other chemical systems, under standard conditions) depend both upon the radiation's power and frequency. For lower frequencies of EMR up to those of visible light (i.e., radio, microwave, infrared), the damage done to cells and also to many ordinary materials under such conditions is determined mainly by heating effects, and thus by the radiation power. By contrast, for higher frequency radiations at ultraviolet frequencies and above (i.e., X-rays and gamma rays) the damage to chemical materials and living cells by EMR is far larger than that done by simple heating, due to the ability of single photons in such high frequency EMR to damage individual molecules chemically.

OCCURRENCE AND IMPORTANCE OF ELECTROMAGNETIC RADIATION
Close to 0.01 percent of the mass/energy of the entire universe occurs in the form of electromagnetic radiation. All human life is immersed in it and modern communications technology and medical services are particularly dependent on one or another of its forms. In fact, all living things on Earth depend on the electromagnetic radiation received from the Sun and on the transformation of solar energy by photosynthesis into plant life or by biosynthesis into zooplankton, the basic step in the food chain in oceans. The eyes of many animals, including those of humans, are adapted to be sensitive to and hence to see the most abundant part of the Sun’s electromagnetic radiation—namely, light, which comprises the visible portion of its wide range of frequencies. Green plants also have high sensitivity to the maximum intensity of solar electromagnetic radiation, which is absorbed by a substance called chlorophyll that is essential for plant growth via photosynthesis.
Practically all the fuels that modern society uses—gas, oil, and coal—are stored forms of energy received from the Sun as electromagnetic radiation millions of years ago. Only the energy from nuclear reactors does not originate from the Sun.
Everyday life is pervaded by man-made electromagnetic radiation: food is heated in microwave ovens, airplanes are guided by radar waves, television sets receive electromagnetic waves transmitted by broadcasting stations, and infrared waves from heaters provide warmth. Infrared waves also are given off and received by automatic self-focusing cameras that electronically measure and set the correct distance to the object to be photographed. As soon as the Sun sets, incandescent or fluorescent lights are turned on to provide artificial illumination, and cities glow brightly with the colourful fluorescent and neon lamps of advertisement signs. Familiar too is ultraviolet radiation, which the eyes cannot see but whose effect is felt as pain from sunburn. Ultraviolet light represents a kind of electromagnetic radiation that can be harmful to life. Such is also true of X rays, which are important in medicine as they allow physicians to observe the inner parts of the body but exposure to which should be kept to a minimum. Less familiar are gamma rays, which come from nuclear reactions and radioactive decay and are part of the harmful high-energy radiation of radioactive materials and nuclear weapons.

EFFECTS OF ELECTROMAGNETIC RADIATION ON EARTH

Share This

Details

Type Project
Department Geophysics
Project ID GPH0013
Price ₦3,000 ($20)
Chapters 5 Chapters
No of Pages 58 Pages
Methodology Scientific
Reference YES
Format Microsoft Word

500
Leave a comment...

    Details

    Type Project
    Department Geophysics
    Project ID GPH0013
    Price ₦3,000 ($20)
    Chapters 5 Chapters
    No of Pages 58 Pages
    Methodology Scientific
    Reference YES
    Format Microsoft Word

    Related Works

    ABSTRACT This project work was carried out to access the level of electromagnetic radiation risk awareness from cell phones in selected audience of cell phone users using a Questionnaire. The reduction in the adverse effect of electromagnetic radiation from cell phones is theoretically explained in the research work. The Questionnaires were... Continue Reading
    ABSTRACT The Scientific Committee on Emerging and Newly Identified Health Risks (SCENIHR) has updated the previous opinion on 'Possible effects of Electromagnetic Fields (EMF), Radio Frequency Fields (RF) and Microwave Radiation on human health' by the Scientific Committee on Toxicity, Ecotoxicity... Continue Reading
    ABSTRACT           This case study is “comparing the strength of blocks made from: cement stabilized laterite blocks, cement stabilized red earth blocks and sand,  red earth and laterite blocks and mud blocks dried in the kiln.           This project implement the following analysis (1)             To  effect ... Continue Reading
    ABSTRACT This case study is “comparing the strength of blocks made from: cement stabilized laterite blocks, cement stabilized red earth blocks and sand, red earth and laterite blocks and mud blocks dried in the kiln. This project implement the following analysis (1)To effect reduction to the rise in market price of sand (fine aggregate),... Continue Reading
    COMPARING THE STRENGHT AS BLOCKS MADE FROM (1) CEMENT AND LATERITIC SOIL (2) CEMENT AND RED EARTH (3) LATERITE, SAND AND RED EARTH ABSTRACT This case study is “comparing the strength of blocks made from: cement stabilized laterite blocks, cement stabilized red earth blocks and sand, red earth and laterite blocks and mud blocks dried in the kiln.... Continue Reading
    ABSTRACT             This case study is “comparing the strength of blocks made from: cement stabilized laterite blocks, cement stabilized red earth blocks and sand,  red earth and laterite blocks and mud blocks dried in the kiln.             This project implement the following analysis... Continue Reading
    Electromagnetic Distance Measurement (EDM) equipment is calibrated on a base to determine  instrument constants and errors. A series of measurements on a base can also be used to check  the performance and reliability of the instrument over time and to assess its precision against  the manufacturer's specifications. This research work, the... Continue Reading
    ABSTRACT This study proposes to bring out the social relevance of Niyi Osundare’s The Eye of the Earth. African Oral aesthetics or the Social relevance are the verbal parts of African Oral Literature, Osundare uses this extensively in most of his work and this study aims at looking at that. Systematic sampling will be used for the selection of... Continue Reading
    The effect of magnetic treatment of water on the growth, yield and germination of maize seed has a positive impact in Agricultural crop production... Continue Reading
    ABSTRACT Literary scholars believed that literature serves as one of the viable tools for transforming and liberating the society from it ills. This study however attempted to investigate the socio-political motifs in Niyi Osundare’s the Eye of the Earth and Village voices. The researcher applied the Marxist theory in order to have a clearer and... Continue Reading
    Call Us
    Get this work
    whatsappWhatsApp Us