What is the minimum angular spread of a 633-nmwavelength He-Ne laser beam that is originally 1.00 mm indiameter?(b) If this laser is aimed at a mountain cliff 15.0 km away, howbig will the illuminated spot be?(c) How big a spot would be illuminated on the Moon,neglecting atmospheric effects? (This might be done to hit acorner reflector to measure the round-trip time and, hence,distance.) Explicitly show how you follow the steps inProblem-Solving Strategies for Wave Optics

What is the minimum angular spread of a 633-nmwavelength He-Ne laser beam that is originally 1.00 mm indiameter?(b) If this laser is aimed at a mountain cliff 15.0 km away, howbig will the illuminated spot be?(c) How big a spot would be illuminated on the Moon,neglecting atmospheric effects? (This might be done to hit acorner reflector to measure the round-trip time and, hence,distance.) Explicitly show how you follow the steps inProblem-Solving Strategies for Wave Optics

University Physics Volume 3

17th Edition

ISBN:9781938168185

Author:William Moebs, Jeff Sanny

Publisher:William Moebs, Jeff Sanny

Chapter4: Diffraction

Section: Chapter Questions

Problem 74P: An X-ray scattering experiment is performed on a crystal whose atoms form planes separated by 0.440...

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(a) What is the minimum angular spread of a 633-nm wavelength He-Ne laser beam that is originally 1.00 mm in diameter? (b) If this laser is aimed at a mountain cliff 15.0 km away, how big will the illuminated spot be? (c) How big a spot would be illuminated on the Moon, neglecting atmospheric effects? (This might be done to hit a corner reflector to measure the round-trip time and, hence, distance.)
Assume that you want to bounce a laser beam off the Moon. Assume the laser beam is TEM9,0 and that the Moon is a distance of 3.8 · 10$ meters from Earth. Calculate the following. (a) Assume that the initial beam waist of a CO, laser running on the 10.6 µm line is 15 cm. How large is the beam waist when the beam hits the Moon? What is the radius of curvature? (b) Assume that the initial beam waist of a CO, laser running on the 10.6 µm line is 1.5 meters. How large is the beam waist when the beam hits the Moon? What is the radius of curvature? (c) Repeat part (a) for an excimer laser operating at 254.0 nm; use the same beam waist. |(d) Repeat part (b) for an excimer laser operating at 254.0 nm; use the same beam waist. (e) From your answers to parts (a-d), speculate on what kind of laser and what type of associated optical system you would want to use in order to optimally bounce a laser beam off the Moon.
Estimate the angular spread of a laser beam due todiffraction if the beam emerges through a 3.0-mm-diametermirror. Assume that λ = 694nm What would be the diameter of this beam if it struck (a) a satellite 340 km above the Earth, or (b) the Moon?
spacing of d: 190onm. Heve laser (x =6233 nm) shores on diffechun gruhrg wth a A d- spacing Haw diffrachain spots are vsible on are mary Sile of the (nut inchuchiy Cantal Cerhrul reximam maximum), a)5 6) 4 c) 3 d) 2 es 1
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) If a total of 33 MHz of bandwidth is allocated to particular FDD cellular telephone system which uses two 25 kHz simplex channels to provide full duplex voice and control channels. 1. Compute the number of channels available per cell if a system uses four-cell reuse. 2. If 1 MHz of the allocated spectrum is dedicated to control channels, determine an equitable distribution of control channels and voice channels in each cell.
A 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) ?
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.
He–Ne lasers are often used in physicsdemonstrations. They produce light of wavelength 633 nm and a powerof 0.500 mW spread over a cylindrical beam 1.00 mm in diameter(although these quantities can vary). What is the average energy density in the laser beam?
After measuring at the (200) Bragg peak, moving to the (400) Bragg peak, how much an angle need to raotate the Δ2θ and Δω ?
What is the approximate average energy, average frequency and average wavelength associated withthe 23 MV beam?
The light that plants absorb to perform photosynthesis has a wavelength that peaks near 675 nm. Express thisdistance in (a) millimeters and (b) inches.