If the aircraft is flying at FL280 and the horizontal distance from the aircraft to the radar is 35NM, what is the time required for the radar to detect the aircraft?
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Q: Compute the frequency (in MHz) of an EM wave with a wavelength of 6.7 in. (0.1702 m).
A: wavelength of EM wave (λ) = 6.7 in = 0.1702 m Speed of EM wave (v) = 3×108 ms
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A: The expression for find frequency of EM is f=vλ
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Q: What is the wavelength (in meters) of an em wave with a freuqency of 86.3 GHz (1 GHz = 109 Hz)?
A: Given : f = 86.3 GHz = 86.3 x 109 Hz
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Q: Take the ratio of these two areas
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Q: Why is the x-component of the NW direction negative, but not its y-component?
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Q: Find the frequency f in terahertz of visible light with a wavelength of 493 nm in vacuum. f = %3D
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A: The wavelength of a wave is given by λ = vf, where v = speed of the wave f = frequency of the wave
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A: Equation for electric field E=E0sin2πft Equation for magnetic field B=B0sin2πft Frequency of the…
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- The ICNIRP also has guidelines for magnetic-field exposure for the general public. In the frequency range of 25 Hz to 3 kHz, this guideline states that the maximum allowed magnetic-field amplitude is 5>f T, where f is the frequency in kHz. Which is a more stringent limit on allowable electromagnetic-wave intensity in this frequency range: the electric-field guideline or the magnetic-field guideline? (a) The magnetic-field guideline, because at a given frequency the allowed magnetic field is smaller than the allowed electric field. (b) The electric-field guideline, because at a given frequency the allowed intensity calculated from the electric-field guideline is smaller. (c) It depends on the particular frequency chosen (both guidelines are frequency dependent). (d) Neither—for any given frequency, the guidelines represent the same electromagneticwave intensityHow far does light travel in one year? [This distance is know as a light-year (ly) and is used in measuring astronomical distances.]A message was sent from Mars to Earth. Mars is approximately 54.6 million kilometers away from the earth. If the message was sent via radio waves at 4:38:00 AM (PHT) at what time (PHT) will it be received here on earth?
- (a) Approximately how long would it take a telephone signal to travel 2790 mi from coast to coast across the United States? (Telephone signals travel at about the speed of light.)=_________ seconds(b) Approximately how long would it take a radio signal to reach the International Space Station (ISS) at an orbital altitude of 350 km?=_________ secondsAn AM radio station broadcasts with a frcqucncy of 691 kHz. The hcight of its broadcast antenna is onc quartcr of the wavclength. Find the height (in m) of the antenna.Compute the frequency (in MHZ) of an EM wave with a wavelength of 2.3in. (0.0584 m)
- 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 do they reach their most negative value?dl L = U- RI dt Solve this equation for I(t) with I(0) =lo. What is I(t) as t approaches infinity?A laser pointer emits a cylindrical beam of light in the air of wavelength 633 nm , power 30 milliwatts and beam diameter 2mm . Ignoringng spreading of the beam , the peak amplitude E0 of the electric field , ( in volts/metre) is : give answer to a decimal
- Compute the frequency (in MHz) of an EM wave with a wavelength of 3.3 in. (0.0838 m).Distances in space are often quoted in units of light years, the distance light travels in one year. The most distant galaxy yet discovered is 12.0 × 109 light years away. How far is this in meters?Problem 4: Consider the 100-MHz radio waves used in an MRI device. Part (a) What is the wavelength, in meters, of these radio waves? Part (b) If the frequencies are swept over a ±14 MHz range centered on 100 MHz, what is the minimum, in meters, of the range of wavelengths emitted? Part (c) What is the maximum, in meters, of this wavelength range?