Assuming the energy density of the cosmic background radiation of the Big Bang has the value 3.75 ✕ 10−14 J/m3, what is the corresponding electric field amplitude (in mV/m)?
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Assuming the energy density of the cosmic background
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- Q: An AM radio signal propagating in free space has: E = Eo sin(1200πt - βz)ax H= (Eo / η)*sin(1200πt- βz)az Express these in phasor form and detrmine β and η such that the fields Satisfy Maxwell’s equations.A microscopic spherical dust particle of radius r and mass m is moving in outer space at a constant speed v. A wave of light strikes it from the opposite direction of its motion and gets absorbed. Assuming the particle decelerates uniformly to zero speed in time t, write an equation for the average electric field amplitude in the light.Problem-1: An asteroid is hurtling toward earth at 150,000“. The temperature of the asteroid is about 100 K, meaning that its peak emission is 2 = 29 µm. The speed of light is c = 3E[8]. a) What is the wavelength of light that we receive from the asteroid? (Answer: 2.89855E[-05] m)
- 2.37. A 300 MHz uniform plane wave, traveling along the x-axis in the negative x-direction, whose electric field is given by E, = E,(jâ, + 3â¸)e*jkx where E, is a real constant, impinges upon a dipole antenna that is placed at the origin and whose electric field radiated toward the x-axis in the positive x-direction is given by E. = E,(â, + 2â,)e¬jke where E, is a real constant. Determine the following: (a) Polarization of the incident wave (including axial ratio and sense of rotation, if any). You must justify (state why?). (b) Polarization of the antenna (including axial ratio and sense of rotation, if any). You must justify (state why?). (c) Polarization loss factor (dimensionless and in dB). Incident Wave AntennaA planar electromagnetic wave is propagating in the -x direction. At a certain point P and at a given instant, the electric field of the wave is given by E = (1.27 V/m) ĵ. What is the magnitude and direction of the magnetic field vector of the wave (in nT) at the point P at that instant? Denote the +z direction as positive, and the -z direction as negative. (Use c = 2.9979 × 108 m/s) nTWhat is the velocity of a beam of electrons that go undeflected when passing through crossed (perpendicular) electric and magnetic fields of magnitude 1.93×104 V/m and 2.50×10-3T, respectively? me=9.11×10-31kg, e=1.60×10-19 C.
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- A current of (1.124x10^0) A is used to charge a parallel plate capacitor with square plates. The side of each plate is (6.0160x10^1) cm. What is the displacement current through a (4.31x10^-3) m² area wholly between the capacitor plates and parallel to them? Answer with three significant figures in mA.Verify the claim that that ionospheric charge densities of a few tens of ions or electrons per cubic meter create ionospheric electric fields of 1mV/m.The electric field intensity in the region 0 <.x < 5, 0SEE MORE QUESTIONS