Rayleigh scattering - Study guides, Class notes & Summaries

Fiber Install and Activation 100% SOLUTIONS REVISED 2023//2024 Which standards organization is considered to be the creator of the worlds' most recognized communications standards, known as "recommendations"? - ANSWERS The International Telecommunications Union (ITU) In which component in a fiber-optics communication system do changes to the intensity of the optical signal occur? - ANSWERS The optical transmitter What is a drawback of using Fabry-Perot (F-P)lasers in high-speed...

Fiber Optics Exam Questions and Answers 100% Pass Mode Field Diameter - Answer- The diameter of the light emerging from the end of the fiber is also termed... core, cladding, and prime coating - Answer- The basic construction of fiber is: zig-zag - Answer- A multimode step-index fiber transmits light down the fiber in what pattern? Single-Mode - Answer- This type of fiber has only one mode for the light to travel down. glass core and plastic cladding - Answer- Plastic-clad silica cables ...

SPL wavelength x # of cycles With phased array transducers, the transmitted sound beam is steered by Varying the timing of pulses to the individual piezoelectric elements What type of wave is sound? mechanical and longitudinal The Frequency ranges for Ultrasound are: > 20,000 Hz (20kHz) The speed of sound in soft tissue is: 1540 m/s Linear sequence Array transducer that fires the elements in groups Unit for Wavelength is millimeters Enha...

Mode Field Diameter - Answer The diameter of the light emerging from the end of the fiber is also termed... core, cladding, and prime coating - Answer The basic construction of fiber is: zig-zag - Answer A multimode step-index fiber transmits light down the fiber in what pattern? Single-Mode - Answer This type of fiber has only one mode for the light to travel down. glass core and plastic cladding - Answer Plastic-clad silica cables have what kind of construction? material dispers...

What topology do most fiber-to-the-user (FTTx) networks use, which requires greater fiber color code management in its documentation? - ANSWER Point to multipoint (P2MP) Improper use of nylon tie wraps can induce this problem. - ANSWER Microbends What are potential sources of problems in aerial installations? - ANSWER Falling branches, pole attachment problems, and improper sag and loading considerations. During installation of fiber-optic cable, what does damage to the cable jacket cause?...

Fiber Test and Maintenance 100% SOLUTIONS REVISED 2023//2024 What topology do most fiber-to-the-user (FTTx) networks use, which requires greater fiber color code management in its documentation? - ANSWER Point to multipoint (P2MP) Improper use of nylon tie wraps can induce this problem. - ANSWER Microbends What are potential sources of problems in aerial installations? - ANSWER Falling branches, pole attachment problems, and improper sag and loading considerations. During install...

Incident intensity is? CORRECT ANSWERS: The intensity of the sound beam just before it strikes a reflector Describe normal incidence, and oblique incidence. CORRECT ANSWERS: Normal incidence is when the sound beam hits a reflector at a 90* angle, and oblique is any angle other than 90*. Rayleigh scattering is CORRECT ANSWERS: sound scattering equally in all directions after hitting a reflector smaller than the beam wavelength. RBC's How would impedance increase? CORRECT ANSWERS: If...

There is a net _______ of energy at the surface and a net _____ of energy by the atmosphere - ANSWER-gain; loss Conduction causes... - ANSWER-heat transfer to air in contact with ground Convection causes... - ANSWER-this air near the surface to rise like a helium balloon mixing heat throughout the atmosphere The energy used to change the phase of a substance and it is transferred in the atmosphere through convection - ANSWER-Latent Heat A cooling process - ANSWER-evaporation A war...

Reducing the likelihood of bioeffects from acoustic energy is the mission of the: A. Nyquist limit B. Reynolds number C. Huygens principle D. ALARA principle E. Poiseuille principle - Answer- D. ALARA principle The number of cycles in a pulse directly related to the: A. Duty factor B. SPL C. operating frequency D. PRF E. propagation speed of the medium - Answer- B. SPL The Doppler shift frequency is proportional to the: A. Cosine values B. Doppler angle C. Oper...

SPI ULTRASOUND REGISTRY REVIEW QUESTIONS AND ANSWERS GRADED A SPL wavelength x # of cycles With phased array transducers, the transmitted sound beam is steered by Varying the timing of pulses to the individual piezoelectric elements What type of wave is sound? mechanical and longitudinal The Frequency ranges for Ultrasound are: > 20,000 Hz (20kHz) The speed of sound in soft tissue is: 1540 m/s Linear sequence Array transducer that fires the elements in groups Unit for Wavelength is mill...