An isotropic point source emits light at wavelength 500 nm, at the rate of 50 W. A light detector is positioned 200 m from the source. What is the maximum rate dB/dt at which the magnetic component of the light changes with time at the detector's location? 5.0x10^6 tesla/s 5.0x10^6 gauss/s 6.88x10*6 tesla/s O 2.0x10^6 tesla/s 6.88x10^6 gauss/s 3.44x10^6 tesla/s 3.44x10^6 gauss/s 2.0x10^6 gauss/s None of them 1.72x10*6 tesla/s O 1.72x10^6 gauss/s

An isotropic point source emits light at wavelength 500 nm, at the rate of 50 W. A light detector is positioned 200 m from the source. What is the maximum rate dB/dt at which the magnetic component of the light changes with time at the detector's location? 5.0x10^6 tesla/s 5.0x10^6 gauss/s 6.88x106 tesla/s O 2.0x10^6 tesla/s 6.88x10^6 gauss/s 3.44x10^6 tesla/s 3.44x10^6 gauss/s 2.0x10^6 gauss/s None of them 1.72x106 tesla/s O 1.72x10^6 gauss/s

College Physics

10th Edition

ISBN:9781285737027

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter24: Wave Optics

Section: Chapter Questions

Problem 7P: Two radio antennas separated by d = 3.00 102 cm. as shown in Figure P24.7, simultaneously broadcast...

See similar textbooks

Similar questions

How many helium atoms, each with a radius of about 31 pm, must be placed end to end to have a length equal to one wavelength of 470 nm blue light?
A Doppler weather radar station broadcasts a pulse of radio waves at frequency 2.85 GHz. From a relatively small batch of raindrops at bearing 38.6 east of north, the station receives a reflected pulse after 180 s with a frequency shifted upward by 254 Hz. From a similar batch of raindrops at bearing 39.6 east of north, the station receives a reflected pulse after the same time delay, with a frequency shifted downward by 254 Hz. These pulses have the highest and lowest frequencies the station receives, (a) Calculate the radial velocity components of both batches of raindrops. (b) Assume that these raindrops are swirling in a uniformly rotating vortex. Find the angular speed of their rotation.
Two radio antennas separated by d = 3.00 102 cm. as shown in Figure P24.7, simultaneously broadcast identical signals at the same the signals. (a) If the car is at the position of the second maximum wavelength. A car travels due north along a straight line at position x = 1.00 103 m from the center point between the antennas and its radio receives the signal. (a) If the car is at the position of the second maximum after that at point O when it has traveled a distance of y = 4.00 102 m northward, what is the wavelength of the signals? (b) How much farther must the car travel from thus position to encounter the next minimum in reception? Hint: Do not use the small-angle approximation in this problem.
Figure P24.13 shows a plane electromagnetic sinusoidal wave propagating in the x direction. Suppose the wavelength is 50.0 m and the electric field vibrates in the xy plane with an amplitude of 22.0 V/m. Calculate (a) the frequency of the wave and (b) the magnetic field B when the electric field has its maximum value in the negative y direction. (c) Write an expression for B with the correct unit vector, with numerical values for Bmax, k, and , and with its magnitude in the form B=Bmaxcos(kxt) Figure P24.13 Problems 13 and 64.
In Figure P37.52, suppose the transmission axes of the left and right polarizing disks are perpendicular to each other. Also, let the center disk be rotated on the common axis with an angular speed . Show that if unpolarized light is incident on the left disk with an intensity Imax, the intensity of the beam emerging from the right disk is I=116Imax(1cos4t) This result means that the intensity of the emerging beam is modulated at a rate four times the rate of rotation of the center disk. Suggestion: Use the trigonometric identities cos2=12(1+cos2) and sin2=12(1cos2). Figure P37.52
A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of this signal if it is received on a planet orbiting Proxima Centuri, the closest star to our Sun, at 4.243 ly away?
Unpolarized light passes through three polarizing filters. The first filter has its transmission axis parallel to the z direction, the second has its transmission axis at an angle of 30.0 from the z direction, and the third has its transmission axis at an angle of 60.0 from the z direction. If the light that emerges from the third filter has an intensity of 250.0 W/m2, what is the original intensity of the light?
The movable mirror of a Michelson interferometer is attached to one end of a thin metal rod of length 23.3 mm. The other end of the rod is anchored so it does not move. As the temperature of the rod changes from 15°C to 25 C , a change of 14 fringes is observed. The light source is a He Ne laser, =632.8 nm . What is the change in length of the metal bar, and what is its thermal expansion coefficient?
An isotropic point source emits light at wavelength 550 nm, at the rate of 230 W. A light detector is positioned 430 m from the source. What is the maximum rate dB/dt at which the magnetic component of the light changes with time at the detector's location? The speed of light is c = 3 × 108 m/s, and μ0 = 4π × 10-7 H/m.
A signal from of PLDT-Fibr travels through its optic cable at the speed of (2x108 m/s).a.) How long will it take for the signal to travel from our house to LJ’s house which has a30.35 km distance b.) What length in inches of the optic cable represents 0.75 ms(millisecond)?
A beam of light has a wavelength of 420 nm. What is the frequency of that light? a 1.40 E −6 hz b 7.14 E 3 hz c 1.26 E 11 hz d 7.14 E 14 hz
The speed of a light wave in a certain transparent material is 0.5790.579 times its speed in vacuum, which is 3.00×108 m/s3.00×108 m/s. When yellow light with a frequency of 5.23×1014 Hz5.23×1014 Hz passes through this material, what is its wavelength ?� in nanometers?