PDF Publication Title:
Text from PDF Page: 029
2.2.4 Spectral Analysis When an atom moves from a higher to a lower energy level, the packet or quanta of energy released is called a photon. This photon’s wavelength varies according to the type of atom it originated from and the size of the drop in energy from the high energy level of an ‘excited atom’ to the lower energy level of a ‘stable atom’. This can be analysed by a spectrometer. A spectrometer is an instrument that spreads out light, from a source, into a spectrum and displays it for study. A typical spectrometer is an enclosed container that keeps out any extraneous light. Light from a source (a material being heated until it gives off light for analysis) enters through a narrow slit and then passes through a collimating lens. This lens causes the light to become a beam of parallel light rays. The parallel light beam is then passed through a prism, which breaks up the beam into its spectral colours. A lens focuses this light onto the exit slit. This is designed so that only one colour can pass through this slit at a time. Therefore, the prism must be rotated to bring the other colours into line with the exit slit in order to scan the specific spectrum given off by that particular substance. A circular scale records the angle of the prism, so the wavelengths can be identified as they pass through the exit slit (Cutnell and Johnson, 2001). Each element produces a pattern of lines that differs from the patterns produced by all other elements. These are called Fraunhofer lines. These patterns can indicate which atoms are in a sample and thus what their energy levels are. In this way, the exact components of any material in the sample can be identified. There are now newer technologies and instruments capable of performing these functions in a more efficient manner than described above. A few examples of a spectrometer’s uses are for the detection of impurities in steel and other metal alloys, forensics, analysis of the composition of celestial bodies and to detect pollutants in air and water (NASA, 2005). This knowledge is important because it forms part of the theoretical basis for Spectro- Chrome Therapy (Section 1.9). 2.2.5 The Nature of Light: Particle or Wave? Originally, light was thought to have only a particulate (particle-like) nature. This quality could be demonstrated by streams of photons coming into contact with an object, some being absorbed or reflected, and leaving a definite shadow behind the object. However, an experiment performed by English scientist Thomas Young, in 1802, demonstrated the wave nature of light by showing two overlapping light waves interfering with each other. This experiment involved light of a single wavelength (monochromatic light) passing through a single narrow slit and falling on two closely spaced narrow slits. The two slits opened out onto a dark background. A 16PDF Image | THE USE OF LIGHT AND COLOUR AS A HEALING MODALITY
PDF Search Title:
THE USE OF LIGHT AND COLOUR AS A HEALING MODALITYOriginal File Name Searched:
light-healing-modality.pdfDIY PDF Search: Google It | Yahoo | Bing
Cruise Ship Reviews | Luxury Resort | Jet | Yacht | and Travel Tech More Info
Cruising Review Topics and Articles More Info
Software based on Filemaker for the travel industry More Info
The Burgenstock Resort: Reviews on CruisingReview website... More Info
Resort Reviews: World Class resorts... More Info
The Riffelalp Resort: Reviews on CruisingReview website... More Info
CONTACT TEL: 608-238-6001 Email: greg@cruisingreview.com (Standard Web Page)