Introduction To Health Physics
5th Edition
ISBN: 9780071835275
Author: Johnson, Thomas E. (thomas Edward), Cember, Herman.
Publisher: Mcgraw-hill Education,
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 14, Problem 14.37P
(a)
To determine
MPE for intrabeam viewing.
(b)
To determine
The value of Nominal ocular hazard distance(NOHD).
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solutionStudents have asked these similar questions
A laser used in eye surgery emits a 3.00-mJ pulse in 1.00 ns, focused to a spot 30.0 µm in diameter on the retina. (a) Find (in SI units) the power per unit area at the retina. (This quantity is called the irradiance.) (b) What energy is delivered per pulse to an area of molecular size (say, a circular area 0.600 nm in diameter)?
A laser used in eye surgery emits a 3.60-mJ pulse in 1.00 ns, focused to a spot 45.0 µm in diameter on the retina.
(a) Find (in SI units) the power per unit area at the retina. (This quantity is called the irradiance.)_________ W/m2(b) What energy is delivered per pulse to an area of molecular size (say, a circular area 0.400 nm in diameter)?___________ J
Q1.A) If an 8-bit SAR ADC is used to
digitize 8V full scale signal, what will
be the digital o/p for an analog i/p of
5.76 V (perform complete analysis)?
Q1.B) Explain why active filters are
designed as biquadratic sections ?
Chapter 14 Solutions
Introduction To Health Physics
Ch. 14 - Prob. 14.11PCh. 14 - Calculate the gain of a 30-cm-diameter parabolic...Ch. 14 - Prob. 14.13PCh. 14 - Prob. 14.14PCh. 14 - What is the maximum magnetic intensity in a plane...Ch. 14 - Prob. 14.16PCh. 14 - A rectangular horn antenna, 17cm24cm and operating...Ch. 14 - Prob. 14.18PCh. 14 - Prob. 14.19PCh. 14 - Prob. 14.20P
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- The x-ray linear attenuation coefficient of water at 40 keV is ?????? = 0.27 ??−1.The CT number of a tumor reported by a CT scanner is 60 HU. Calculate the linear attenuation coefficient of the tumor tissue ?arrow_forwardA laser with 589 nm wavelength and a beam diameter of 2 mm is fed through a beam-expander,then aimed from point A to point B at a distance of 2.75 km.What expansion factor is required for the beam-expander in order that the diffraction-limited spotat point B has a diameter of 30 cm (defined as the diameter of the first dark ring) ?arrow_forwardOxygenated hemoglobin absorbs weakly in the red (hence its red color) and strongly in the near infrared, whereas deoxygenated hemoglobin has the opposite absorption. This fact is used in a “pulse oximeter” to measure oxygen saturation in arterial blood. The device clips onto a person’s finger and has two light emitting diodes (i.e., LEDs) – a red (660nm) and an infrared (940nm) – and a photocell that detects the amount of light transmitted through the finger at each wavelength a)Determine the frequency of each of these light sources. b)If the intensity of the beams is 1.00X10-6 Watts/m2 , calculate the peak electric and magnetic fields of the light supplied by the LEDs.arrow_forward
- Beam Parameters. The light emitted from a Nd:YAG laser at a wavelength of 1.06 μm is a Gaussian beam of 1-W optical power and beam divergence 200 = 1 mrad. Determine the beam waist radius, the depth of focus, the maximum intensity, and the intensity on the beam axis at a distance z = 100 cm from the beam waist.arrow_forwardCompute λD and ND for the following cases: (a) A glow discharge, with n = 1016 m-3, KT, = 2 eV. (b) The earth's ionosphere, with n = 1012 m-3, KT, = 0.1 eV. (c) A ϴ-pinch, with n = 1023 rn-3, KT, = 800 eVarrow_forwardAn interference filter is to be constructed for isolation of the nitrobenzene absorption band at 1537cm-1. a) If it is to be based on first-order interference, what should be the thickness of the dielectric layer(refractive index of 1.34)? b) What other wavelength would be transmitted?arrow_forward
- In an aircraft, to protect a PCB from external interference signals it is housed in an Aluminum(Al) Box (this is normally referred to as shielding). Conductivity of Al is 38.2 x 106 S/m & µr = 1. What shall be the minimum thickness of the Al sheet from which this box is made, if we have to block 1.6 MHz interference signal from passing through this sheet?arrow_forwardQ. 1. An X-ray beam of wavelength 0.71 A is diffracted by a cubic KCL crystal of density 1.99x10^3 Kgm-3. Calculate the interplanner spacing for (200) planes and glancing angle for the second order reflection from these planes. The molecular weight of KCL is 74.6 amu and the Avagadro’s numberis 6.023x10^26 Kg-1 mole-1.arrow_forwardWhat is the d-spacing of an XRD of a BCC crystal corresponding to a peak at 50ᵒ when studied using 1.5406 Aᵒ wavelength X-ray?. If a = 14.5316 Aᵒ for the crystal, what are the Miller indices corresponding to this peak?arrow_forward
- An ultrafast laser produces pulses of 75 fs duration at a rate of 2.3 kHz and a total average power of 103 mW. For an individual laser pulse, calculate the following. (a) the length in meters 4.9 772.5e-17 X m (b) the energy in joules 4.0 41.2e-6 X J (c) the peak power in watts 4.0 5.44e-8 X Warrow_forwardeach pulse produced by an argon-fluoride excimer laser used in PRK and LASIK ophthalmic surgery lasts only 10.0ns but delivers an energy of 2.50mJ. (a) what is the power produced during each pulse? (b) if the beam has a diameter of 0.850mm, what is the average instenisty of the beam during each pulse? (c) if the laser emits 55 pulses per second, what is the average power it generates?arrow_forwardQuestion 4 te p rieipee Adleet yret haslieparatm divtance ol 0.de mm. The fint height fringe ppcas S mm aluve the middle of the central hright fimer, when the alita are ithamatef with a laner of wavelength S12 n. What in the dstance to the sTEn from the slitu? O 0,65 m O n45 m O 0.77 m O 1.12 m O 0.56 marrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
- College PhysicsPhysicsISBN:9781305952300Author:Raymond A. Serway, Chris VuillePublisher:Cengage LearningUniversity Physics (14th Edition)PhysicsISBN:9780133969290Author:Hugh D. Young, Roger A. FreedmanPublisher:PEARSONIntroduction To Quantum MechanicsPhysicsISBN:9781107189638Author:Griffiths, David J., Schroeter, Darrell F.Publisher:Cambridge University Press
- Physics for Scientists and EngineersPhysicsISBN:9781337553278Author:Raymond A. Serway, John W. JewettPublisher:Cengage LearningLecture- Tutorials for Introductory AstronomyPhysicsISBN:9780321820464Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina BrissendenPublisher:Addison-WesleyCollege Physics: A Strategic Approach (4th Editio...PhysicsISBN:9780134609034Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart FieldPublisher:PEARSON
College Physics
Physics
ISBN:9781305952300
Author:Raymond A. Serway, Chris Vuille
Publisher:Cengage Learning
University Physics (14th Edition)
Physics
ISBN:9780133969290
Author:Hugh D. Young, Roger A. Freedman
Publisher:PEARSON
Introduction To Quantum Mechanics
Physics
ISBN:9781107189638
Author:Griffiths, David J., Schroeter, Darrell F.
Publisher:Cambridge University Press
Physics for Scientists and Engineers
Physics
ISBN:9781337553278
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning
Lecture- Tutorials for Introductory Astronomy
Physics
ISBN:9780321820464
Author:Edward E. Prather, Tim P. Slater, Jeff P. Adams, Gina Brissenden
Publisher:Addison-Wesley
College Physics: A Strategic Approach (4th Editio...
Physics
ISBN:9780134609034
Author:Randall D. Knight (Professor Emeritus), Brian Jones, Stuart Field
Publisher:PEARSON