Imagine a flashlight creates a bright spot 10 meters away with an intensity I = 1W/m. If you shine the flashlight over at something 30 meters, away what is the intensity of the light at the more distance spot?

Imagine a flashlight creates a bright spot 10 meters away with an intensity I = 1W/m. If you shine the flashlight over at something 30 meters, away what is the intensity of the light at the more distance spot?

University Physics Volume 2

18th Edition

ISBN:9781938168161

Author:OpenStax

Publisher:OpenStax

Chapter16: Electromagnetic Waves

Section: Chapter Questions

Problem 98AP: A radio station broadcasts its radio waves with a power of 50,000 W. What would be the intensity of...

See similar textbooks

Related questions

Q: m = 220 g Find the moment of inertia about an axis that passes through mass A and is perpendicular…

Q: A capacitor has a charge of 40 μC. The potential difference between the conductors is 300 V. What is…

A: Approach to solving the question:Please see attached photos for detailed solutions. Thank you.…

Q: Score: estion 6 of 8 86.4% Resources Lx Give Up? Feedback A with mass 2.87 kg oscillates…

A: Step 1: Frequency Step 2: Vmax Step 3: spring constant K Step 4: UmaxStep 5: UStep 5: VStep 5:…

Q: Please give a clear explanation asap..

Q: Distance from laser source to focussing optic = 39.5 cm Power before fiber optic = 0.617 mW Power…

A: Analysis of Fiber Optic Performance for Laser Ignition1. Launching Efficiency:Unfortunately, without…

Q: A high-voltage power line carries a current of 4830 A. If the power line is a height 27 m above the…

A: Solution:I hope this solution helps you, thanks!

Q: Please show steps asap...

A: Given data : The diameter of the bar(d)=20mm Length of the bar (L)=700mm Change in length(ΔL)=7mm…

Q: The electric field intensity of a linearly polarized plane wave propagating in the +z Direction in…

A: a) To determine the attenuation constant, phase constant, intrinsic impedance, phase velocity,…

Q: Please solve this and show the steps

A: The distance directly above the 5 nC charge where the electric potential is zero.We can solve this…

Q: A particle has a charge of 5 mC and is moving 1000 m/s in the positive x direction. At apoint in…

A: Step 1: The formula for the magnetic field produced by a moving charged particle is given by: Step…

Q: 3 Search * $ 4 % 5 A doubly ionized molecule (ie., a molecule lacking two electrons) moving in a…

Q: Find the energy of the photon emitted when an electron drops from the n=18 state to the n=2 state in…

Q: 3. Consider a uniformly charged, perfectly spherical bowling ball of radius 15cm centered at some…

A: The text describes a scenario with a uniformly charged bowling ball, a box, and a rod. It asks…

Q: please draw fbd and then solve for moment

Q: A 6.0 kg toy car can move along an x axis. The figure gives Fx of the force acting on the car, which…

A: the circuit problem because the value of the voltage source (V) is unknown. However, I can guide you…

Q: Vbatt=20 V C1=90 μF C2=55 μF C3=80 μF R1=200 R2=160 t2=27 msec t3=34.2 msec Consider the circuit…

A: Step 1:Given R1= 200ohm,C1= 90μFStep…

Q: hHdjdkkdjshdhd

A: The image you sent contains a question about unpolarized light passing through two polarizing…

Q: What is the wavelength of waves you create in a swimming pool if you splash your hand at a rate of…

A: Step 1:To find the wavelength of the waves created in the swimming pool, we can use the…

Q: 2.5.

Q: The image above is a standard chest X-ray. i) Describe two mechanisms by which X-rays interact with…

A: To address your question about the mechanisms by which X-rays interact with the materials in the…

Q: A bicyclist tilts their bicycle in order to make a circular turn of radius r = 49 m while traveling…

A: The objective of the question is to find the angle from the vertical that the bicyclist must tilt…

Q: In a Laundromat, during the spin-dry cycle of a washer, the rotating tub goes from rest to its…

Q: A skier of mass 80 kg is pulled up a slope by a motor-driven cable. (a) How much work is required to…

Q: A train starts 45 meters to the right of a train station. It travels for 5 minutes along the track,…

Q: (a) If a KS0 meson at rest decays in 7.80 ✕ 10−11 s, how far (in cm) does a KS0 meson travel if it…

A: Step 1:Step 2:Step 3:

Q: Consider the symmetrically arrange charges in the figure which qa=qb=-1.25 uC,& qc= qd= +1.25uC.…

A: Step 1: Step 2: Step 3: Step 4:

Q: Find FB on a particle q = 6.3 x 10-12 C with velocity (-2i + 9j + 3k) km/sec in a B=-field of (4.1i…

Q: A yoyo string pulled up by hand by force F by amount of Ay. The yoyo in dropped at this time by…

A: Sure, I can help you with this physics problem about a yoyo.The diagram shows a yoyo being pulled up…

Q: A copper telephone wire has essentially no sag between poles 36.0 m apart on a winter day when the…

Q: Binary Star SystemAstronomers discover a binary star system with a period of 90 days, separated by a…

A: In the figure big circular represent the circular orbit( path) of the binary stars Thank you

Q: A gas phase H19F molecule has a bond length of 91.68 pm and a vibrational force constant,k = 966…

A: Step 2: Calculate the Period of RotationThe period of rotation Tr for a rotational level J is given…

Q: Consider the symmetrically arranged charges in the figure, in which q₁ ==-3.65 μC and q = q = +3.65…

Q: Water at a gauge pressure of 3.8 atm at street level flows into an office building at a speed of…

A: Step 1:

Q: Find X and Y forces?

A: Step 1:But in the given diagram it is 367⁰ Step 2: If the angles at the B and D are misprint or…

Q: Which is(are) true? The energy carried by an electromagnetic wave in a vacuum: A.…

Q: You are using a thin layer of epoxy to bond a Silicon chip to a pure aluminum plate that acts as a…

A: Approach to solving the question: Detailed explanation: Examples: Key references:

Q: In a Young's double-slit experiment the separation distance y between the second-order bright fringe…

A: Step 1:separation between second bright fringe and central bright fringe is y=0.0180mwavelength of…

Q: A doctor is trying to find out if their patient is experiencing blood clots, and decides to use a…

A: Step 1: So, the doctor would expect a change in frequency of approximately 125.48 Hz between the…

Q: Solve the two first question please

A: However, based on your description of the problem and the formula you provided (I = (1/12) * m_B *…

Q: How do you calculate the over turning moment of a cube that is 12inx12inx12in?

A: To calculate the overturning moment of a cube, you need to consider the force causing the…

Q: A uniform magnetic field of 4.35 T points in some direction. Consider the magnetic flux through a…

A: The objective of the question is to find the minimum and maximum of the absolute value of the…

Q: In a darkened room, a burning candle is placed 1.63 m from white wall. A lens is placed between…

Q: 1D TRIANGLE RING ELECTRIC FIELD Consider a thin triangular ring with equal side lengths of 1.9 cm,…

A: The objective of the question is to calculate the magnitude of the electric field at a point above…

Q: What is the distance travelled by a ball rolling down a hill if itos moving at an acceleration of…

Q: 3. A 100-loop square coil of wire, with side length d = 5.00 cm and total resistance 100 Q, is…

A: Step 1:Step 2:Step 3:Step 4:

Q: A golfer hits a ball with an initial velocity of 41.7m/s and is launched at an angle of 36° above…

A: Step 1:Step 2:Step 3:Step 4:

Q: Page 17 of 20 Question 17 (1 point) The period of a simple pendulum depends on the mass, the…

Q: Only solve part C. The answer for B is 4.64 rad/s

A: Step 1:Step 2:Step 3:

Q: 14. A 25.0 kg girl goes down a slide at an amusement park, reaching the bottom. The slide is 10.0m…

Q: Required information Skip to question When a tuning fork is held over the open end of a very thin…

A: Resonance occurs when the length of the air column in the tube matches certain multiples of the…

Question

Expert Solution

This question has been solved!

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

SEE SOLUTION Check out a sample Q&A here

Step by step

Solved in 2 steps

SEE SOLUTION Check out a sample Q&A here

Similar questions

Suppose a spherical particle of mass m and radius R in space absorbs light of intensity I for time t. (a) How much work does the radiation pressure do to accelerate the particle (mm rest In the given tine It absorbs the light? (b) How much energy canted by the electromagnetic waves is absorbed by the particle over this time based on the radiant energy incident on the particle?
The electric field of an electromagnetic wave traveling in vacuum is described by the following wave function: E =(5.00V/m)cos[kx(6.00109s1)t+0.40] j where k is the wavenumber in rad/m, x is in m, t s in Find the following quantities: (a) amplitude (b) frequency (c) wavelength (d) the direction of the travel of the wave (e) the associated magnetic field wave
Assume the helium-neon lasers commonly used in student physics laboratories have power outputs of 0.500 mW. (a) If such a laser beam is projected onto a circular spot 1.00 mm in diameter, what Is its Intensity? (b) Find the peak magnetic field strength. (C) Find the peak electric field strength.
A plane electromagnetic wave of frequency 20 GHz moves in the positive y-axis direction such that its electric field is pointed along the z-axis. The amplitude of the electric field is 10 V/m. The start of time is chosen so that at t = 0, the electric field has a value 10 V/m at the origin. (a) Write the wave function that will describe the electric field wave, (b) Find the wave function that will describe the associated magnetic field wave.
During normal beating, the heart creates a maximum 4.00-mV potential across 0.300 m of a person’s chest, creating a 1.00-Hz electromagnetic wave. (a) What is the maximum electric field strength created? (b) What is the corresponding maximum magnetic field strength in the electromagnetic wave? (C) What is the wavelength of the electromagnetic wave?
Why is t1 radiation pressure of an electromagnetic wave on a perfectly reflecting surface twice as large as the pressure on a perfectly absorbing surface?
The Sun’s energy strikes Earth at an intensity of 1.37kW/m2 . Assume as a mode! approximation that all of the light is absorbed. (Actually, about 30% of the light intensity is reflected out into space.) (a) Calculate the total force that the Sun’s radiation exerts on Earth. (b) Compare this to the force of gravity between the Sun and Earth. Earth’s mass is 5.9721024 kg.
A radio station broadcasts at a frequency of 760 kHz. At a receiver some distance from the antenna, the maximum magnetic field of the electromagnetic wave detected is 2.151011T . (a) What is the maximum electric field? (b) What is the wavelength of the electromagnetic wave?
Suppose the maximum safe intensity of microwaves for human exposure is taken to be 1,00 W/m2. (a) If a radar unit leaks 10.0 W of microwaves (other than those sent by its antenna) uniformly in all directions, how far away must you be to be exposed to an intensity considered to be safe? Assume that the power spreads uniformly over the area of a sphere with no complications from absorption or reflection, (b) What is the maximum electric field strength at the safe intensity? (Note that early radar units leaked more than modem ones do. This caused identifiable health problems, such as cataracts, for people who worked near them.)
Suppose a source of electromagnetic waves radiates uniformly in all directions in empty space where there are no absorption or interference effects. (a) Show that the intensity is inversely proportional to r2, distance from the source squared. (b) Show that the magnitudes of the electric and magnetic fields are inversely proportional to r.
The following represents an electromagnetic wave traveling in the direction of the positive y-axis: Ex=0;E0cos(kxt);Ez=0Bx=0;By=0;Bz=B0cos(kxt) The wave is passing through a wide tube of circular cross- section of radius R whose axis is along they-axis. Find the expression for the displacement current through the tube.
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.