Radiation therapy

1 Introduction Interferometry is a measurement technique which utilizes the interference of waves in a medium to cre-ate interference patterns [5]. In general, the waves can be light, sound or radio waves. The interference pattern is detected by a photodetector and it provides some useful information about the properties of the object or phenomenon under test. Interferometers are used to make very small measurements that cannot be achieved with any other method. An important…

Visual acuity Main article: Visual acuity Visual acuity is the eye's ability to detect fine details and is the quantitative measure of the eye's ability to see an in-focus image at a certain distance. The standard definition of normal visual acuity (20/20 or 6/6 vision) is the ability to resolve a spatial pattern separated by a visual angle of one minute of arc. The terms 20/20 and 6/6 are derived from standardized sized objects that can be seen by a "person of normal vision" at the specified…

Introduction Thermodynamics is an essential concept examined during the construction stage of houses, especially in the countries reaching extreme temperatures, such as Australia. By understanding the physics involved in thermodynamics throughout the construction stage of houses, such as heat transfer involving different colours and thicknesses, it is possible to re-examine the insulation of houses in hot countries. Such a report can lead to finding the most appropriate colour and thickness for…

Since ancient Greece, humanity has become fascinated with science. The development of new technologies that will further the existence of mankind, has been the goal for many great scientists. Through centuries of experimenting, the mid-evil era of alchemy, and many years after, Chemistry became a topic of much importance. During the 1800’s, science had become one of the most rapidly growing fields as explanations for how things work, or the technological progression allowing us to discover more.…

1.0 INTRODUCTION It is known that radiation can be very harmful to a person’s health. According to Marshall and Keene (2006:1), with the recent expansion of diagnostic and interventional radiology, it has been noted that an alarming dose of radiation can be administered to a patient, in a single scan, without having to repeat a procedure. With the evolution of radiography, interventional radiology has become a norm in the diagnosis protocol and it is therefore important to understand the concept…

Are dogs colorblind? the answer yes/ no, they see in color, just not the way humans do due to the lack of certain cones in their eyes. Moreover, how does color blindness work in humans? To see how color works we first have to analyze how we perceive color. The way we see “Color” is determined by the wavelength of a stream of light. This means that each color of light has its own wavelength. The combination of all lightwaves (primary colors) produces white. The absence of lightwaves makes an…

What if you found out your cell phone could kill you? Radiation is part of our natural world; however, it is often dramatically increased by man made objects (Gould, 2017). There are many different things to know about radiation, and questions to ask including what objects give off radiation, the dangers involved in radiation, and symptoms of radiation sickness. The radiation of everyday objects and the different types of radiation effect the human body in many ways which can sometimes be…

Diagram of Prototype A that consisted of an octagonal prism with a length of 11 in. or 27.94 cm. and height of 10.16 cm., while we created corrugated layers within the prism. We decided to change all the dimensions to centimeters instead of using inches as the units. Tinkercad model of Prototype B that consisted of a hexagonal prism with a length of 27.94 cm., height of 10.16 cm., and sides of the base of 4.445 cm. WIthin the hexagonal prism consisted of 6 equilateral triangles are connected…

with a longer wavelength and lower frequency than visible light. (Wikipedia) IR Spectroscopy is a method to identify substances based on their absorption of infrared wavelengths. It is a study of how the molecules of substances can absorb infrared radiation and convert it into heat. (Cole) A machine called an infrared spectrometer applies infrared rays to a substance to record the number of wavelengths absorbed by said substance. (Cole) This works because of covalent bonds within substances.…

The world is full of a multitude of colors that are used for both practical and aesthetic purposes. The colors that are seen when looking at different objects are due to the ability of the compounds in those objects to absorb specific wavelengths of light. In other words, the colors that are seen are the ones that are not absorbed. The wavelengths of light that are absorbed are determined by the electrons in a compound.1 As electrons move around, they can absorb energy and become excited. The…