The beam from a 1.3 W laser has a radius of 0.7 mm. If the beam...
The beam from a 1.3 W laser has a radius of 0.7 mm. If the beam is directly perpendicular to a 100% reflective mirror, what force does the light exert on the mirror?
a) 8.67 nN b) 11.3 nN c) 14.0 nN d) 16.0 nN e) 4.32 nN
Homework Answers
A laser beam has a radius of 1.4 mm. How powerful does the laser have to...
A laser beam has a radius of 1.4 mm. How powerful does the laser have to be for the maximum magnitude of the magnetic field in the beam to be 6.0 μT?
A helium-neon laser produces a beam of diameter 1.75 mm, delivering 2.90 x 1018 photons/s. Each...
A helium-neon laser produces a beam of diameter 1.75 mm, delivering 2.90 x 1018 photons/s. Each photon has a wavelength of 633 nm (a) Calculate the amplitude of the electric field inside the beam. kV/m (b) Calculate the amplitude of the magnetic field inside the beam (c) If the beam shines perpendicularly onto a perfectly reflecting surface, what force does it exert on the surface? nN (d) If the beam is absorbed by a block of ice at 0°C for...
A 1.0-mW laser has a beam radius of 0.6 mm . What is the intensity of...
A 1.0-mW laser has a beam radius of 0.6 mm . What is the intensity of this beam? S = ?
In the figure, a laser beam of power 6.01 W and diameter 2.60 mm is directed...
In the figure, a laser beam of power 6.01 W and diameter 2.60 mm is directed upward at one circular face (of diameter d < 2.60 mm) of a perfectly reflecting cylinder. The cylinder is levitated because the upward radiation force matches the downward gravitational force. If the cylinder's density is 1.05 g/cm3, what is its height H? D H Number Units
A laser pulse has an energy of 17] and a beam radius of 2 mm. The...
A laser pulse has an energy of 17] and a beam radius of 2 mm. The pulse duration is 5 ns and the energy density is uniformly distributed within the pulse. (a) What is the spatial length of the pulse? 1.5 m (b) What is the energy density within the pulse? 901.878 14 kJ/m3 (c) Find the rms values of the electric and magnetic fields in the pulse. Eo = * MV/m Bo =
A. B. C. D. A laser beam has a power of 10 W of blue light...
A.
B.
C.
D.
A laser beam has a power of 10 W of blue light that is horizontally polarized. It passes through a series of filters with axis of polarization at 0° w.r.t. the horizontal, 45° w.r.t. the horizontal, and 90° w.r.t. the horizontal. What is the power that emerges from these polarizers? Optic axis 2 = 45° Optic axis =90° Eof incoming light Optic axis 1=0° O 2.5 W Oow 01.25 W O 5W There is a magnetic...
EXERCISE HINTS: GETTING STARTED I'M STUCKI A laser has a power of 20.0 W and a...
EXERCISE HINTS: GETTING STARTED I'M STUCKI A laser has a power of 20.0 W and a beam radius of 0.549 mm. (a) Find the intensity of the laser. 2.11E7 I W/m2 (b) Suppose you were floating in space and pointed the laser beam away from you. What would your acceleration be? Assume your total mass, including equipment, is 73.3 kg and that the force is directed through your center of mass. Hint: The change in momentum is the same as...
Laserpointer Points:1 A laserpointer has a beam intensity of 54 W/m2 and a beam radius of...
Laserpointer Points:1 A laserpointer has a beam intensity of 54 W/m2 and a beam radius of 2 mm. A first grader attempts to use it to move a black toy car. Assuming perfect absorption, what is the force on the car? 9.04*10A-12 N Incorrect. Tries 4/12 Previous Tries Submit Answer Send Feedback Post Discussion
A o c ol of w has 25 turns and has a radius of 0.075 m....
A o c ol of w has 25 turns and has a radius of 0.075 m. The coil is loca van magnetic field whose behavior is shown on the graph. At all times magnetic field is directed at an angle of 75" relative to the normal to the plane of a what is the average of induced in the coil in the time interval from t = 5.00 s to 7.5 E -Nd 0 at a) -18 mv b) 49...
A tungsten wire in a vacuum has length 16.0 cm and radius 6.00 mm. A potential...
A tungsten wire in a vacuum has length 16.0 cm and radius 6.00 mm. A potential difference is applied across it. (a) What is the resistance of the wire at 293 K? (b) Suppose the wire reaches an equilibrium temperature such that it emits 90.0 W in the form of radiation. Neglecting absorption of any radiation from its environment, what is the temperature of the wire? (Note: e = 0.320 for tungsten.) (c) What is the resistance of the wire...
A helium-neon laser produces a beam of diameter 1.75 mm, delivering 2.90 x 1018 photons/s. Each photon has a wavelength of 633 nm (a) Calculate the amplitude of the electric field inside the beam. kV/m (b) Calculate the amplitude of the magnetic field inside the beam (c) If the beam shines perpendicularly onto a perfectly reflecting surface, what force does it exert on the surface? nN (d) If the beam is absorbed by a block of ice at 0°C for...
In the figure, a laser beam of power 6.01 W and diameter 2.60 mm is directed upward at one circular face (of diameter d < 2.60 mm) of a perfectly reflecting cylinder. The cylinder is levitated because the upward radiation force matches the downward gravitational force. If the cylinder's density is 1.05 g/cm3, what is its height H? D H Number Units
A laser pulse has an energy of 17] and a beam radius of 2 mm. The pulse duration is 5 ns and the energy density is uniformly distributed within the pulse. (a) What is the spatial length of the pulse? 1.5 m (b) What is the energy density within the pulse? 901.878 14 kJ/m3 (c) Find the rms values of the electric and magnetic fields in the pulse. Eo = * MV/m Bo =
A.
B.
C.
D.
A laser beam has a power of 10 W of blue light that is horizontally polarized. It passes through a series of filters with axis of polarization at 0° w.r.t. the horizontal, 45° w.r.t. the horizontal, and 90° w.r.t. the horizontal. What is the power that emerges from these polarizers? Optic axis 2 = 45° Optic axis =90° Eof incoming light Optic axis 1=0° O 2.5 W Oow 01.25 W O 5W There is a magnetic...
EXERCISE HINTS: GETTING STARTED I'M STUCKI A laser has a power of 20.0 W and a beam radius of 0.549 mm. (a) Find the intensity of the laser. 2.11E7 I W/m2 (b) Suppose you were floating in space and pointed the laser beam away from you. What would your acceleration be? Assume your total mass, including equipment, is 73.3 kg and that the force is directed through your center of mass. Hint: The change in momentum is the same as...
Laserpointer Points:1 A laserpointer has a beam intensity of 54 W/m2 and a beam radius of 2 mm. A first grader attempts to use it to move a black toy car. Assuming perfect absorption, what is the force on the car? 9.04*10A-12 N Incorrect. Tries 4/12 Previous Tries Submit Answer Send Feedback Post Discussion
A o c ol of w has 25 turns and has a radius of 0.075 m. The coil is loca van magnetic field whose behavior is shown on the graph. At all times magnetic field is directed at an angle of 75" relative to the normal to the plane of a what is the average of induced in the coil in the time interval from t = 5.00 s to 7.5 E -Nd 0 at a) -18 mv b) 49...
A tungsten wire in a vacuum has length 16.0 cm and radius 6.00 mm. A potential difference is applied across it. (a) What is the resistance of the wire at 293 K? (b) Suppose the wire reaches an equilibrium temperature such that it emits 90.0 W in the form of radiation. Neglecting absorption of any radiation from its environment, what is the temperature of the wire? (Note: e = 0.320 for tungsten.) (c) What is the resistance of the wire...
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