Radiation is the energy emitted by matter in the form of electromagnetic waves. Radiation therapy (also called radiotherapy) is a cancer treatment that uses high doses of radiation to kill cancer cells and shrink tumors. At low doses, radiation is used as an x-ray to see inside your body and take pictures, such as x-rays of your teeth or broken bones. the radiation emitted by a surface to the radiation emitted by a perfect emitter at the same temperature. Fundamental Concept 1.1 Introduction: An antenna (or aerial) is an electrical device which converts electric power into radio waves, and vice versa. 2.1 Appropriate use of radiation in paediatric imaging 2.1.1 Fundamentals of radiation protection in health care 2.1.1.1 Medical imaging referrers and providers The International Basic Safety Standards for Protection against Ionizing Radiation and for the Safety of Radiation Sources (BSS) establish specific responsibilities for health profes- The emitted radiation strikes a second surface, where it is reflected, absorbed, or transmitted (Figure 1.5). The intensity and distribution of radiant energy within this range is governed by the temperature of the emitting surface. radiation therapy, in which doses which would be lethal if delivered to the whole body are commonly delivered to very limited areas, e.g., to tumor sites. Here we will look into thermal radiation (10-7 m to 10-4 m) since we are dealing with heat transfer. C. Variation in Species and Individual Sensitivity Dr.V.Thrimurthulu Lecture Notes Antenna & Wave Propagation CREC Dept. The theory of the energy distribution of blackbody radiation was developed by … • When atoms decay by emitting a or b particles to form a new atom, the nuclei of the new atom formed may still have too much energy to be completely stable. The portion that contributes to the heating of the surface is the absorbed radiation… CBSE Class 12 Physics Chapter 11 Dual Nature of Radiation and Matter Notes in PDF are available for free download in myCBSEguide mobile app. of ECE P a g e | 5 1. • Gamma rays are electromagnetic radiation with high frequency. The best app for CBSE students now provides Dual Nature of Radiation and Matter class 12 Notes latest chapter wise notes for quick preparation of CBSE board exams and school-based annual examinations. How is radiation therapy given? Thermal radiation ranges in wavelength from the longest infrared rays through the visible-light spectrum to the shortest ultraviolet rays. Here you can download the free lecture Notes of Heat Transfer Pdf Notes – HT Pdf Notes materials with multiple file links to download. Chapter 3—Radioactivity 3-5 Beta particles are electrons or positrons (electrons with positive electric charge, or antielectrons).Beta decay occurs when, in a nucleus with too many protons or too many neutrons, one of the protons or neutrons is transformed into the other. In radiation, the internal energy of an object decreases. Generally when expressing external radiation exposure without qualifying the area of the body involved, whole-body irradiation is assumed. 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