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- Radio station WWVB, operated by the National Institute of Standards and Technology (NIST) from Fort Collins, Colorado, at a low frequency of 60 kHz, broadcasts a time synchronization signal whose range covers the entire continental US. The timing of the synchronization signal is controlled by a set of atomic clocks to an accuracy of 101012 s, and repeats every 1 minute. The signal is used for devices, such as radio-controlled watches, that automatically synchronize with it at preset local times. WWVB's long wavelength signal tends to propagate close to the ground. (a) Calculate the wavelength of the radio waves from WWVB. (b) Estimate the error that the travel time of the signal causes in synchronizing a radio controlled watch in Norfolk, Virginia, which is 1570 mi (2527 km) from Fort Collins, Colorado.A 2.0-mW helium-neon laser transmits a continuous beam of red light of cross-sectional area 0.25 cm2. If the beam does not diverge appreciably, how would its rms electric field vary with distance from the laser? Explain.A 2.0-mW helium-neon laser transmits a continuousbeam of red light of cross-sectional area 0.25 cm2 . If thebeam does not diverge appreciably, how would its rmselectric field vary with distance from the laser? Explain.
- 4) By using the Fourier transform methed or Fourier Series solve the DDES with t 324. Suitable Ies and B. CS..When a high-power laser is used in the Earth's atmosphere the electric field associated with the laser beam can ionize the air, turning it into a conducting Plasma that reflects the laser light. In dry air at 0°C and 1 atm, electric breakdown occurs for fields with amplitudes above about 3:00 Mv/m a) At this maximum Intensity, what Power can be delivered in a cylindrical beam diameter 4 3.03mm? Note Answer must be in W.1
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- If electric and magnetic field strengths vary sinusoidally in time, being zero at t=0, then E=E0 sin 2πft and B=B0 Sin 2πft . Let f = 1.00 GHz here When are the field strengths first zero?A circular radar antenna on a Coast Guard ship has a diameter of 2.10 m and radiates at a frequency of 14.0 GHz. Two small boats are located 8.00 km away from the ship. How close together could the boats be and still be detected as two objects? Need Help? Watch It Read ItProblem 7: :A confocal resonator is Im long, which I used in the He-Ne laser. Calculate the spot size in the center of the resonator and both mirrors , note that the laser wavelength is 632.8 nm.
