🏷️ LIMITED TIME OFFER: GET 20% OFF GRADE+ YEARLY SUBSCRIPTION →
Log in
Physics
2
answers
0
watching
69
views

In an electromagnetic wave in free space, the electric and magnetic fields are?

Watch
2
answers
0
watching
69
views

For unlimited access to Homework Help, a Homework+ subscription is required.

Unlock all answers

Get 1 free homework help answer.
Already have an account? Log in
Share
B. Haranadh Kumar
B. Haranadh KumarLv10
15 Sep 2020
Already have an account? Log in
Share

Related textbook solutions

Physics: Principles with Applications
7th Edition, 2013
Giancoli
ISBN: 9780321625922

Related questions

  • Select the best definition for wavelength.
  1. The height of an oscillating electromagnetic wave.
  2. The rate at which electromagnetic waves oscillate.
  3. The distance between two crests of an electromagnetic wave.
  4. The oscillations of electric and magnetic fields.

 

  • Select the best definition for frequency.
  1. The oscillations of electric and magnetic fields.
  2. the height of an oscillating electromagnetic wave.
  3. the distance between two crests of an electromagnetic wave.
  4. The rate at which electromagnetic waves oscillate.

Electromagnetic waves transport energy. This problem shows you which parts of the energy are stored in the electric and magnetic fields repsectively and also makes a useful connection between the energy density of a plane electromagnetic wave and the poynting vector.

In this problem we explore the properties of a plane electromagentic wave traveling at the speed of light c along the x axis through vacuum. Its electric and magnetic fields are as follows:

Throughout use these variables  (E, B, ,k,x,) in answers. You will also need the permittivity of free space and the permeability of free space .

(a) What is the instantaneous energy density in the electric field of the wave?

(b) What is the instantaneous energy density in the magnetic field of the wave?

(c) What is the average energy density in the electric field of the wave?

(d) What is the average energy density in the magnetic field of the wave?

(e) Derive an expression for averafe enerhy density in the whole wave.

The phase difference between the electric and magnetic fields in an electromagnetic wave is

Weekly leaderboard

Home
Homework Help 3,900,000
Physics 110,000
Start filling in the gaps now
Log in