An electromagnetic radiation source radiates uniformly in all directions. How does the magnitude of the electric field strength Em vary with distance r from the source? (Think about what conservation of energy implies about how the Intensity varies with distance r from the source) a.Em is proportional to 1/r b.Em is constant for electromagnetic waves c.Em is proportional to 1/r3 d.Em is proportional to 1/r2

An electromagnetic radiation source radiates uniformly in all directions. How does the magnitude of the electric field strength Em vary with distance r from the source? (Think about what conservation of energy implies about how the Intensity varies with distance r from the source) a.Em is proportional to 1/r b.Em is constant for electromagnetic waves c.Em is proportional to 1/r3 d.Em is proportional to 1/r2

Related questions

Q: 7. Why are electromagnetic waves unique? All electromagnetic waves are the same length. Each…

A: Electromagnetic waves are waves having electric field and magnetic field both perpendicular to the…

Q: A candle radiates light equally in all directions at an average rate of 80 W. At a certain distance…

A: Power radiated by candle, P=80 W Maximum electric field strength, E0=27.7 N/C

Q: The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with an…

A: Given rms value of the magnetic field is Brms=2.0×10-10 T Area of the window is A=0.19 m2 Time…

Q: Faraday's Law The magnetic field inside a 6.0-cm-diameter superconducting solenoid varies…

Q: If the frequency of an electromagnetic wave is reduced to one third, what happens to the wavelength?…

A: Given Of F1 is the initial frequency of the electromagnetic wave, And F2 is the final frequency…

Q: Question 7 A plane electromagnetic wave has an average (rms) electric field magnitude of Erms - 30…

A: We know the average intensity is given by S=c∈0Erms2 Where S is the average intensity, c is the…

Q: A satellite orbiting the earth in the upper atmosphere experiences a radiation pressure of 5.0 x…

Q: Which of the following terms described the direction in which an electromagnetic wave oscillates? O…

Q: Propagation Direction Electric Field (E) Magnetic Field (B) -2 Wavelength=6.85x10 m Calculate the…

Q: According to Maxwell equations, which one of these statements is wrong: All electromagnetic waves…

A: solution as

Q: EM wave A has 9 times the intensity of EM wave B. What is the ratio of the electric field magnitude…

Q: E(x, t) = (1,200 N/C) sin[(9.0 x 106 m¯¹)x - (2.7 x 10¹5 rad/s)t] a. Red O b.Blue O c. Orange O d.…

A: Given, Angular frequency w = 2.7 × 1015 rad/s w = 2πf f = w/2π = 2.7 × 1015 / ( 2 × 3.14) f =…

Q: 61. III Currents induced by rapid BIO field changes in an MRI sole- INT noid can, in some cases,…

A: Length (L) = 8 cm diameter = 1 cm radius = 0.5 cm density = 1100 kgm3specific heat = 3600…

Q: The microwave radiation left over from the Big Bang explosion of the universe has an average energy…

Q: Part A You've recently read about a chemical laser that generates a 20.0-cm-diameter, 24.0 MW laser…

Q: QUESTION 7 A 0.350-A current is charging a capacitor that has circular plates 12.0 cm in radius. If…

Q: A certain laser pointer has an output of 3.53 milliwatts of power (this is the average power). This…

Q: 7. The electromagnetic wave that delivers a cellular phone call to a car has a magnetic field with…

Q: 3. At a particular moment in time and space, we measure an electromagnetic wave's electric and…

A: The nature of the electromagnetic waves is transverse. These waves contain both electric and…

Q: The magnitude of the electric field at a point P for a certain electromagnetic wave is 890 N/C what…

A: Given that For a electromagnetic wave Magnitude of the electric field at point-P is E = 890 N/C Let…

Question

An electromagnetic radiation source radiates uniformly in all directions. How does the magnitude of the electric field strength E_m vary with distance r from the source? (Think about what conservation of energy implies about how the Intensity varies with distance r from the source)

a.E_m is proportional to 1/r

b.Em is constant for electromagnetic waves

c.E_m is proportional to 1/r³

d.E_m is proportional to 1/r²

Interaction between an electric field and a magnetic field.

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

Which of the following terms described the direction in which an electromagnetic wave oscillates? a. The polarization b. The frequency c. The amplitude d. The wavelength e. The wave speed
an electromagnetic wave (E&M Wave), i.e., the electric field, E, and the magnetic induction, B, determine the direction that the electromagnetic wave will travel. B
A parallel-plate capacitor with circular plates of radius 0.10 m is being discharged. A circular loop of radius 0.20 m is concentric with the capacitor and halfway between the plates. The displacement current through the loop is 2.0 A. At what rate is the electric field between the plates changing? a) 7.2 x 1012 V m.s b) 2.7 x 10¹2 V. m.s c) 7.2 x 1010 V m.s d) 7.2 x 10² V. m.s
4. A circular capacitor of radius R holds a conductive current I. as it begins charging. As the current charges the capacitor, the electric field between the plates begin to increase in strength of E(t) = at³ +c in Newtons per Coulomb. (a) State the expression for Maxwell-Ampere's law. What is the major dif- ference between the Maxwell-Ampere law and Ampere's Law? Show how we arrive to this solution. (b) Determine the magnetic field strength at t = 2 seconds and position from center of cross section of capacitor at r = (1/4)R in terms of µo and eo.
solve
Problem 5. Assume that electromagnetic propagation through space is what we have been calling "free space." b) How long does it take to communicate with electromagnetic waves from Mars to Earth? Another way of asking this question is how long does it take for an electromagnetic signal originating on Mars to reach Earth? c) for two humans separated by 6 feet, how long does it take for the light reflected off of one person to be seen by the other person?
Part A Estimate the rms electric field in the sunlight that hits Mars, knowing that the Earth receives about 1350 W/m? and that Mars is 1.52 times farther from the Sun (on average) than is the Earth. ? Erms = V/m
A conducting loop around a region of strong magnetic field contains two lightbulbs, as shown. The wires connecting the bulbs are ideal. The magnetic field is increasing rapidly.a. Do the bulbs glow? Why or why not?b. If they glow, which bulb is brighter? Or are they equally bright? Explain.
4. As noted in the preceding example, the Sun delivers about 1 000 W/m² of energy to the Earth's surface via electromagnetic radiation. (a) Calculate the total power that is incident on a roof of dimensions 8.00 m ×20.0 m. (b) Determine the radiation pressure and the radiation force exerted on the roof, assuming that the roof covering is a perfect absorber.
The vector direction of the electromagnetic field in a propagating light wave is called a. the polarization b. the amplitude c. the frequency d. the propagation constant e. the phase