Refer to the graph below. The graph represents the Iraadiance, in Wicm. vedistance, in mm, from the center of a high power laser beam operating ea.)mode.a)What is the beams DIAMETER in units of centimeters?b)What is the total power output, in Watts, of the laser?Irraidance versus Distance42001000800Irraidance600(W/cm^2)4002000.51.5-1.5-1-0.5-2Distance from center of beam (mm)

a.)The width or diameter of beam is defined as distance between the points on curve which are at…

Answered: Refer to the graph below. The graph…

Inquiry into Physics

8th Edition

ISBN:9781337515863

Author:Ostdiek

Publisher:Ostdiek

Chapter8: Electromagnetism And Em Waves

Section: Chapter Questions

Problem 19Q

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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)?
Q3] A pulse radar system transmits 100 kW power through an isotropic antenna and receives 1 mW power. Assume o = 1 m2 and operating frequency=1 GHz. a) What is the range of the target? b) Discuss, mathematically, how you can increase the range by a factor 2 without changing the abovementioned radar figures.
Two girls with two-way radios are at the intersection of two country roads that meet at a 105° angle (see the figure). One begins walking in a northerly direction along one road at a rate of 5 mi/hr at the same time the other walks east along the other road at the same rate. If each radio has a range of 10 miles, how long will the girls maintain contact?
I’m having a hard time understanding this problem??
As space exploration increases, means of communicationwith humans and probes on other planets are being developed.(a) How much time (in s) does it take for a radio wave of fre-quency 8.93x10^7s⁻¹ to reach Mars, which is 8.1x10^7km from Earth? (b) If it takes this radiation 1.2 s to reach the Moon, howfar (in m) is the Moon from Earth?
An outdoor WIFi unit for a picnic area has a 100-mW output and a range of about 30 m. What output power would reduce its range to 12 m for use with the same devices as before? Assume there are no obstacles in the way and that microwaves into the ground are simply absorbed.
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . Aircraft equipped with powerful radar units are forbidden from using them when parked on the ground near people. Explain why this is so.
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically require integrating or extending the concepts presented thus far.) . Explain how electromagnetic waves are a natural outcome of the principles of electromagnetism.
Shown below is the interference pattern of two radio antennas broabcasting the same signal. Explain how this is analogous to the interference pattern for sound produced by two speakers. Could this be used to make a directional antenna system that broadcasts preferentially in certain directions? Explain.
(Indicates a review question, which means it requires only a basic understanding of the material to answer. Questions without this designation typically involve integrating or extending the concepts presented thus far.) . Describe how you could use two large, circular Polaroid filters in front of a circular window as a kind of window shade.
Suppose you are located 180 in from a radio transmitter. (a) How many wavelengths are you from the transmitter if the station calls itself 1150 AM? (The AM band frequencies are in kilohertz.) (b) What if this station is 98.1 FM? (The FM band frequencies are in megahertz.)
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.

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