COLLEGE PHYSICS,V.1-W/ENH.WEBASSIGN
10th Edition
ISBN: 9781305411906
Author: SERWAY
Publisher: CENGAGE L
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 28, Problem 51AP
(a)
To determine
The power per unit area at the retina.
(b)
To determine
The energy delivered to per pulse to an area of molecular size.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
When a powerful laser is employed in the Earth's atmosphere, the accompanying electric field may ionize the air, transforming it into a plasma that reflects the laser light. Electric breakdown occurs in dry air at 0°C and 1 atm when field amplitudes above around 3:00 Mv/m a). At this maximum intensity, how much Power can a cylindrical beam with a diameter of 4.03 mm deliver? Note Answer must be in W.
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
A laser beam of power 6.0 W and diameter of 2.0 mm is directed upward at a highly reflective oil droplet of density 0.85 g/cm^3. What maximum radius droplet can be levitated by the radiation pressure of the laser beam?
Chapter 28 Solutions
COLLEGE PHYSICS,V.1-W/ENH.WEBASSIGN
Ch. 28.3 - Prob. 28.1QQCh. 28.4 - Prob. 28.2QQCh. 28.5 - Prob. 28.3QQCh. 28 - Prob. 1CQCh. 28 - Prob. 2CQCh. 28 - Prob. 3CQCh. 28 - Prob. 4CQCh. 28 - Prob. 5CQCh. 28 - Prob. 6CQCh. 28 - Prob. 7CQ
Ch. 28 - Prob. 8CQCh. 28 - Prob. 9CQCh. 28 - Prob. 10CQCh. 28 - Prob. 11CQCh. 28 - Prob. 12CQCh. 28 - Prob. 13CQCh. 28 - Prob. 14CQCh. 28 - Prob. 15CQCh. 28 - Prob. 1PCh. 28 - Prob. 2PCh. 28 - Prob. 3PCh. 28 - Prob. 4PCh. 28 - Prob. 5PCh. 28 - Prob. 6PCh. 28 - Prob. 7PCh. 28 - Prob. 8PCh. 28 - Prob. 9PCh. 28 - Prob. 10PCh. 28 - Prob. 11PCh. 28 - Prob. 12PCh. 28 - Prob. 13PCh. 28 - Prob. 14PCh. 28 - Prob. 15PCh. 28 - Prob. 16PCh. 28 - Prob. 17PCh. 28 - Prob. 18PCh. 28 - Prob. 19PCh. 28 - Prob. 20PCh. 28 - Prob. 21PCh. 28 - Prob. 22PCh. 28 - Prob. 23PCh. 28 - Prob. 24PCh. 28 - Prob. 25PCh. 28 - Prob. 26PCh. 28 - Prob. 27PCh. 28 - Prob. 28PCh. 28 - Prob. 29PCh. 28 - Prob. 30PCh. 28 - Prob. 31PCh. 28 - Prob. 32PCh. 28 - Prob. 33PCh. 28 - Prob. 34PCh. 28 - Prob. 35PCh. 28 - Prob. 36PCh. 28 - Prob. 37PCh. 28 - Prob. 38PCh. 28 - Prob. 39PCh. 28 - Prob. 40PCh. 28 - Prob. 41PCh. 28 - Prob. 42PCh. 28 - Prob. 43PCh. 28 - Prob. 44PCh. 28 - Prob. 45PCh. 28 - Prob. 46APCh. 28 - Prob. 47APCh. 28 - Prob. 48APCh. 28 - Prob. 49APCh. 28 - Prob. 50APCh. 28 - Prob. 51APCh. 28 - Prob. 52APCh. 28 - Prob. 53APCh. 28 - Prob. 54AP
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
- A small helium-neon laser has a power output of 2.5 mW What is the electromagnetic energy in a 1.0-m length of the beam?arrow_forwardA laser used in eye surgery emits a 3.00 - mJ pulse in 1.00 ns, focused to a spot 30.0 mewm 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)?arrow_forwardEach pulse produced by an argon–fluorideexcimer laser used in PRK and LASIK ophthalmic surgery lasts only10.0 ns but delivers an energy of 2.50 mJ. (a) What is the powerproduced during each pulse? (b) If the beam has a diameter of0.850 mm, what is the average intensity of the beam during eachpulse? (c) If the laser emits 55 pulses per second, what is the average power it generates?arrow_forward
- The count rate for a particular a source X is C0 on a detector placed 1 m from the source. When a metal sheet of thickness 5mm is placed between source and counter the count rate drops by 75%. What is the value of the attenuation coefficient, μ, for this radiation and metal? Select one: a. 0.277 mm-1 b. 0.12 mm-1 c. 6.93 mm d. 3.01 mmarrow_forwardCan an incoming intercontinental ballistic missile bedestroyed by an intense laser beam? A beam of intensity108 W/m2 would probably burn into and destroy a nonspinningmissile in 1 s. (a) If the laser had 5.0 MW power, 3.0 mm wavelength,and a 4.0 m beam diameter (a very powerful laser indeed),would it destroy a missile at a distance of 3000 km? (b) If thewavelength could be changed, what maximum value would work?Use the equation for the central diffraction maximum as given byEq. 36-12 (sin u = 1.22l/d).arrow_forwardCompute for the following wavelength of the following frequency: 5. 50Hzarrow_forward
- A point source emitting 2.1×1012 gamma-rays per second is located at the center of an ironsphere of radius 10 cm. The gamma-rays have an energy of 1.0 MeV. What is the uncollidedgamma-ray flux in cm-2-s-1 at a distance 20 cm from the source, assuming the sphere issurrounded by a vacuum?arrow_forwardPulsed lasers used for science and medicine producevery brief bursts of electromagnetic energy. If the laserlight wavelength is 1062 nm (Neodymium–YAG laser), andthe pulse lasts for 34 picoseconds, how many wavelengthsare found within the laser pulse? How brief would the pulseneed to be to fit only one wavelength?arrow_forwardAM radio waves can be produced by a marconi anthenna, whose length must be one-fourth of the wave's wavelength. What must be the length, in meters, of the antenna to produce a frquency of 630kHz?arrow_forward
- A B-emitting radiation source gives 250 units of radiation at a distance of 4.0 m. At what distance does the radiation drop to one-tenth its original value?arrow_forwardA CO2 laser produces a cylindrical beam of light with a diameter of 0.850 cm. The energy is pulsed, lasting for 2.00 ns, and each burst contains an energy of 200 mJ. What is the length L of each pulse of laser light? What is the average energy per unit volume u(avg) for each pulse?arrow_forwardAn antenna has a diameter of 2 meters. At what frequency does this antenna experience a gain of G = 13dB ?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
Principles of Physics: A Calculus-Based TextPhysicsISBN:9781133104261Author:Raymond A. Serway, John W. JewettPublisher:Cengage Learning
Principles of Physics: A Calculus-Based Text
Physics
ISBN:9781133104261
Author:Raymond A. Serway, John W. Jewett
Publisher:Cengage Learning