Question
In: Physics
A monochromatic light source emits 164 W of average electromagnetic power uniformly in all directions. The...
A monochromatic light source emits 164 W of average electromagnetic power uniformly in all directions. The speed of light is 3 � 10^8 m/s. Calculate the average electric-field energy density 4 m from the source. Answer in units of J/m3 . (uE=1/2 E0E2)
Calculate the average magnetic-field energy density at the same distance from the source. uE=1/2 E0(cB)2
Find the wave intensity at this location.
What is the pressure exerted by the light on a mirror located at the same distance from the source, assuming normal incidence and total reflection?
Solutions
genius_generous answered 1 year agoRelated Solutions
An energy saving lamp with a power of P = 11 W emits an electromagnetic wave...
An energy saving lamp with a power of P = 11 W emits an
electromagnetic wave uniformly in all directions. Calculate the
wave at a distance of r = 3 m from the lamp
(a) the intensity
(b) the radiation pressure
(c) electric field amplitude
(d) the amplitude of the magnetic field
If a 80 W lightbulb emits 3.5 % of the input energy as visible light (average...
If a 80 W lightbulb emits 3.5 % of the input energy as visible
light (average wavelength 550 nm) uniformly in all directions,
estimate how many photons per second of visible light will strike
the pupil (4.0 mm diameter) of the eye of an observer 3.0 km
away.
Using a light source with a power density of 500 W / m2 for a PV...
Using a light source with a power density of 500 W /
m2 for a PV module with a surface area of 0.92 m2, the measured
values at the Tcell = 55 ˚C are given as follows.
The current and voltage value corresponding to the maximum power
point is Vmpp = 30 V and Impp = 1.45.
The open circuit voltage is Voc 38 V and the short circuit
current is Isc 1.70.
The temperature coefficient for...
A spherical source radiates sound uniformly in all directions. At a distance of 13 m, the...
A spherical source radiates sound uniformly in all directions.
At a distance of 13 m, the sound intensity level is 98 dB. What
power is radiated by this source?
Answer 3 significant figures In W
The intensity levels of two people's speech are 62.5 dB and 66.5
dB, respectively. What is the intensity level of the combined
sounds?
Answer 3 significant figures in dB
A person standing a certain distance from seventeen identical
loudspeakers is hearing a sound level intensity...
A laser emits a cylindrical beam of light 4.0 mm in diameter. The average power of...
A laser emits a cylindrical beam of light 4.0 mm in diameter.
The average power of the laser is 2.8 mW . The laser shines its
light on a perfectly absorbing surface.
How much energy does the surface receive in 14 s ?
What is the radiation pressure exerted by the beam?
A speaker at an open-air concert emits 500 W of sound power, radiated equally in all...
A speaker at an open-air concert emits 500 W of sound power,
radiated equally in all directions.
Part A:
What is the intensity of the sound 6.8 m from of the
speaker?
Express your answer to two significant figures and include the
appropriate units.
Part B:
What sound intensity level would you experience there if you did
not have any protection for your ears?
Express your answer using two significant figures. Units must be
in (dB)
Part C:
Earplugs you...
A particular metal illuminated by a monochromatic light source at 1.5 times the cutoff frequency fc...
A particular metal illuminated by a monochromatic light source
at 1.5 times the cutoff frequency fc (in an evacuated
chamber) emits photoelectrons with a maximum kinetic energy
(Kmax) = 1.45 eV. For reference, Planck’s constant is
4.136 x 10-15 eV·s, 1 nm = 10-9 m, 1 eV =
1.60 x 10-19 J, and the speed of light is 3.00 x
108 m/s.
(a) What is the work function (Φ) of this metal in eV? Enter
your answer in the box....
Consider the electromagnetic field produced at a given distance from a light source. Which of the...
Consider the electromagnetic field produced at a given distance from a light source. Which of the following statements are true? Check all that apply. 1. The intensity of the wave is inversely proportional to the square of the fields. 2. The intensity of the wave is proportional to the square of the fields. 3. The intensity of the wave is proportional to the speed of light. 4. The intensity of the wave is inversely proportional to the speed of light.
The sound from a trumpet radiates uniformly in all directions in air with a temperature of...
The sound from a trumpet radiates uniformly in all directions in air with a temperature of 20?C. At a distance of 4.86m from the trumpet the sound intensity level is 53.0dB . The frequency is 585Hz
A)What is the pressure amplitude at this distance?Use 344m/s for the speed of sound in air, 1.20kg/m3 for the density of air, and 1.00
The sound from a trumpet radiates uniformly in all directions in air with a temperature of...
The sound from a trumpet radiates uniformly in all directions in
air with a temperature of 20?C. At a distance of 4.92 m from the
trumpet the sound intensity level is 51.0 dB . The frequency is 562
Hz .
Part A
What is the pressure amplitude at this distance?
Use 344 m/s for the speed of sound in air, 1.20 kg/m^3 for the
density of air, and 1.00×10?12 W/m^2 for the reference
intensity.
Part B
What is the displacement...
ADVERTISEMENT
ADVERTISEMENT
Latest Questions
- A neurologist needs to counsel a stroke victim and her husband about possible outcomes, treatment options,...
- Case Study: Personal Beliefs in the Workplace Don Shakow was a prominent professional who worked in...
- 1: Competency framework usage is the modern best practice in management. What is meant by competency...
- A 19.34 g mixture of sugar (C12H22O11) and table salt (NaCl) is dissolved in 231 g...
- Young and Company claims that its pressurized diving bell will, on average, maintain its integrity to...
- 1) Alternative compiled code sequence using instructions in classes A, B, C. What is the average...
- An asset is purchased on January 1 for $48,700. It is expected to have a useful...
ADVERTISEMENT