Radio waves - Study guides, Class notes & Summaries

2.4 GHz wavelength - longer wavelengths, better range larger channel widths - provide faster speed and throughput but can create greater interference 5 GHz wavelength - supports faster data rates at shorter distances, suited for high density deployments because of greater number of channels that do not overlap What channel widths do 2.4 GHz support? - 20 and 40 MHz What channel widths do 5 GHz support? - 20, 40, 80, 160 MHz omnidirectional antenna - Can transmit and receive with 360-degree...

LASER - ANS Light amplification by the stimulated emission of radiation Light consist of many wave lengths - ANS Laser consist of just one The FDA approved lasers for permanent hair reduction - ANS In. 1997 When was the Ruby crystal laser invented - ANS In 1960 The Ruby crystal uses what wavelength - ANS 694 nm In 1960 the ruby crystal was invented and used for - ANS Dermatology and ophthalmology ELECTROMAGNETIC SPECTRUM of RADIATION - ANS Vis...

d. Outcomes - ️️(unit 11) Patient-centered care should be provided to improve patients: a. Intelligence b. Willingness to pay c. Friendliness d. Outcomes d. Patient modesty - ️️(unit 13) Which of the following is not a benefit of effective cushioning placement? a. Relieves pressure b. Keeps the patient in a position c. Maintains head support d. Patient modesty d. Radio waves; gamma rays - ️️(unit 1) Of the electromagnetic radiation forms, ___ have (has) the lowest energy an...

communications network - Answer- is any collection of devices that have the ability to exchange signals and data with each other. Today, telephone, cellular phone, cable television, satellite television, and computer networks crisscross the globe and offer unprecedented access to information, people, and events. circuit switching, - Answer- circuit switching, which essentially established a dedicated, private link between one telephone and another for the duration of a call A packe...

Ultrasound waves that are traveling through a medium consist of a. electromagnetic and radio frequencies b. compressions and refractions c. electromagnetic and ionizing frequencies d. compressions and rarefactions - ️️d. What is the difference between audible sound and ultrasound? a. audible sound waves can travel through a vacuum b. audible sound has a higher frequency c. ultrasound has a higher frequency d. ultrasound waves are ionizing - ️️c. Damping in a transducer a. redu...

When were X-rays discovered? A. 1795 B. 1890 C. 1895 D. 1901 - correct answer C. 1895 What form of Energy are X-rays? A. Thermal B. Electromagnetic C. Magnetic Resonance D. Alpha particles - correct answer B. Electromagnetic Does Diagnostic Medical Sonography involve Ionizing Radiation? A. Possible B. Yes C. Some D. No - correct answer D. No What does Magnetic Resonance Imaging use to scan patients? A. Magnetic fields and beta particles B. Ionizing Radiation and...

When were X-rays discovered? A. 1795 B. 1890 C. 1895 D. 1901 - Answer-C. 1895 What form of Energy are X-rays? A. Thermal B. Electromagnetic C. Magnetic Resonance D. Alpha particles - Answer-B. Electromagnetic Does Diagnostic Medical Sonography involve Ionizing Radiation? A. Possible B. Yes C. Some D. No - Answer-D. No What does Magnetic Resonance Imaging use to scan patients? A. Magnetic fields and beta particles B. Ionizing Radiation and Light C. Ultrasonic waves and fluoresce...

Bushong: Radiologic Science for Technologists, 12th Edition Chapter 01: Essential Concepts of Radiologic Science Test Bank MULTIPLE CHOICE 1. Matter is measured in . a. kilograms b. joules c. electron volts d. rems ANS: A Matter is measured in kilograms DIF: Easy REF: page 3 OBJ: Recognize the unit of measurement for matter. 2. Energy is measured in . a. kilograms b. joules c. electron volts d. B or C ANS: D Energy is measured in joules or electron volts DIF: Moderate REF: p...

Astronomy Midterm 3 Exam - Questions and Answers (Complete Solutions) If you have a 100-watt light bulb, how much energy does it use each minute? A) 6,000 joules B) 6,000 watts C) 600 joules D) 600 watts E) 100 joules If a material is highly opaque, then it A) reflects most light. B) absorbs most light. C) transmits most light. D) scatters most light. E) emits most light. When light reflects off an object, what is the relation between the angle of incidence and the angle of reflection? A) angl...

What are photons? correct answers particles of light Light always behaves like a stream of particles. (T/F) correct answers True The energy of a photon is directly proportional to its wavelength correct answers False How fast does electromagnetic radiation travel? correct answers speed of light Photons with high energy will have (blank) frequency and (blank) wavelength correct answers High, short X-Rays have (blank) energy, (blank) wavelength, and (blank) frequency than radio wav...