Question

A typical helium-neon laser found in supermarket checkout scanners emits 633-nm-wavelength light in a 1.1-mm-diameter beam with a power of 1.3 mW .

A) What's the amplitude of the oscillating
**electric** field in the laser beam?

B) What's the amplitude of the oscillating
**magnetic** field in the laser beam?

Answer #1

A small helium-neon laser emits red visible light with a power
of 5.90 mW in a beam that has a diameter of 2.10 mm .
a) What is the amplitude of the electric field of the light?
b) What is the amplitude of the magnetic field of the light?
c) What is the average energy density associated with the
electric field?
d) What is the average energy density associated with the
magnetic field?
e) What is the total energy contained...

A small helium-neon laser emits red visible light with a power
of 5.90 mW in a beam that has a diameter of 2.60 mm .
A)What is the amplitude of the electric field of the light?
Express your answer with the appropriate units.
B)What is the amplitude of the magnetic field of the light?
C)
What is the average energy density associated with the electric
field?
Express your answer with the appropriate units.

A laser emits light at power 6.01 mW and wavelength 633 nm. The
laser beam is focused (narrowed) until its diameter matches the
1060 nm diameter of a sphere placed in its path. The sphere is
perfectly absorbing and has density 5.00 × 103
kg/m3. What are (a) the beam intensity
at the sphere's location, (b) the radiation
pressure on the sphere, (c) the magnitude of the
corresponding force, and (d) the magnitude of the
acceleration that force alone would...

A laser emits light at power 5.49 mW and wavelength 633 nm. The
laser beam is focused (narrowed) until its diameter matches the
1230 nm diameter of a sphere placed in its path. The sphere is
perfectly absorbing and has density 5.00 × 103 kg/m3. What are (a)
the beam intensity at the sphere's location, (b) the radiation
pressure on the sphere, (c) the magnitude of the corresponding
force, and (d) the magnitude of the acceleration that force alone
would...

A small helium-neon laser emits red visible light with a power
of 3.80 mW in a beam that has a diameter of 2.70 mm.
(a) What are the amplitudes of the electric and magnetic fields
of the light?
Emax
= V/m
Bmax
= T
(b) What are the average energy densities associated with the
electric field and with the magnetic field?
uE,av
= J/m3
uB,av
= J/m3
(c) What is the total energy contained in a 1.00-m length of the
beam?
J

A helium-neon laser beam has a wavelength in air of 633 nm. It
takes 1.28 ns for the light to travel through 33.0 cm of an unknown
liquid.
What is the wavelength of the laser beam in the liquid?

A helium–neon laser produces a beam of diameter 1.75 mm,
delivering 2.25 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.
______________µT
(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...

A helium–neon laser produces a beam of diameter 1.75 mm,
delivering 1.95 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.
µT?
(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 14.0-mW helium–neon laser emits a beam of circular cross
section with a diameter of 2.90 mm.
(a) Find the maximum electric field in the beam.
________kN/C
(b) What total energy is contained in a 1.00-m length of the
beam?________ pJ
(c) Find the momentum carried by a 1.00-m length of the beam.
_________kg · m/s

A 12.0-mW helium–neon laser emits a beam of circular cross
section with a diameter of 2.35 mm.
(a) Find the maximum electric field in the beam.
kN/C
(b) What total energy is contained in a 1.00-m length of the
beam?
pJ
(c) Find the momentum carried by a 1.00-m length of the beam.
kg · m/s

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