This paper discuss the properties of waves during propagation. I. Introduction Electromagnetic radiation otherwise abbreviated as EMR refers to forms of energy which are produced by oscillating magnetic and electric disturbances or by movement of electrically charged particles travelling through matter or a vacuum . Electromagnetic Radiation is in the forms of waves. These waves include: Radio Waves, Microwaves, Infrared, X- rays and Gamma-rays . The magnetic and electric fields resulting in the electromagnetic waves interact by coming together at right angles to each other and these combined waves move perpendicular to both electric and magnetic oscillating fields and as a result, the disturbance is caused . The resulting electron radiation is released in bundles of light energy which travel at a speed of 299 792 458 m / s, equivalent to the speed of light, as quantized harmonic waves. These electromagnetic waves are grouped according to their wavelength and these results in the electromagnetic spectrum . The resultant magnetic and electric waves move perpendicularly to each other having certain characteristics which are Amplitude, frequency and wavelength . From the origin of the electromagnetic wave, it is propagated outwards in all directions however depending on the type of medium in which it is travelling . For instance if its air, the wave spreads out in a uniform manner in all directions in the medium . After the wave has moved far from its origin, the wave is considered to have spread enough and it appears as though it has it has the same amplitude everywhere which is perpendicular to its direction of flow . And this results in a plane wave. The electromagnetic wave’s speed is equivalent to light speed in a vacuum. When the waves travel in other medium such as water air, and glass, the speed is slower as compared to that in a vacuum . Characteristics of these electromagnetic waves during propagation include; II. Interference This is the process in which two waves superposes to form one resultant wave. For interference to occur, the source of the waves must be coherent . If two electromagnetic waves having the same frequency get together i.e. they superpose, it results into a wave which has the resultant magnetic and electric field strength equal to the sum of fields of the two waves . When two strong waves moving that have their fields moving in one direction, i.e. same direction in time and space, the resulting waveform is twice that of each individual waveform. This results in constructive interference. However, the superposition of a wave having an electric field in one direction in space and with another electromagnetic radiation wave which has the same frequency but with an electric field in the opposite direction in space and time results in cancellation and a result, there is no formation of a waveform . This implies that the two waves are not in phase. The resultant effect is termed as destructive interference. In summary, superposition of wave’s results in destructive, constructive or partial interference considering the magnitude of the waves being superposed . III. Reflection During the transit of electromagnetic wave from one medium into another, and the two media having different refractive index, the speed of the wave changes the transmitted is made to change
Electromagnetic Wave propagation Abstract – To communicate wirelessly involves transmission of signal either analogue or digital from one geographical location to another. To facilitate this, modulation is necessary to enable encoding of the information onto another carrier wave using either digital or analogue techniques…
FDA, 2012). The technology makes use of nuclear magnetic resonance (NMR) properties to image atom nuclei within the body. The human body is a “magnet” by virtue of the fact that it has ionic hydrogen that has a positive charge and a magnetic spin. However, this magnetic spin does not make humans magnetic because these protons spin in a haphazard manner, which cancels out the magnetic properties held by each ion (Hendee & Christopher, 1984).
It was management’s objective to develop a car which is resource and environmentally friendly yet retains the benefits of a modern car (toyoland.com., n.d.). 2. In terms of demographics, their target market are male or female, ages 30 - 50 years old, married and with children.
The man and the wave then had a happy relationship which was later troubled by the wave’s constantly changing moods and the man’s jealousy towards the things that occupy the wave’s time and attention. Eventually, the man decided to leave for a while and when he returned home, he found that the wave had become an ice statue which he then sold to a local waiter and chopped it into small pieces for use in chilling wines.
When the external magnetic pulse is removed, the spinning protons induce an electric signal in pick up coils from which an image of the internal tissue is created digitally. MRI diagnostics produce clearer images of soft tissue and blood flow inside arteries and veins than ultrasound images and are also easier to interpret for the medical technician.
Their movements came in waves causing more women to be aware of their own issues and fight for their rights. The third wave of feminism encompassed a wider spectrum of women’s issues in an attempt to discourage contrived discrimination against women apparent in the perpetuation of segregated gender roles within society such as men being main breadwinners and women being constrained to be homemakers.
MRI is capable to generate clearer and more detained images as compared to the X-ray or Ultrasound scanning techniques. The physics behind the MRI scanning involves the complex nuclear physics and magnetic directivity and resonance. A MRI scanning device is fairly a large device, which is able to hold a person in it.
First, just as other forms waves such as transverse waves and longitudinal waves, are characterized by: Amplitude, Crest, Troughs, Periods, Frequency, and Wave height. Secondly, it was found out that as water waves travel