we didnt see this subject yet..So I am trying to solve the question using just book , and I didnt quite understand.We have energy density and we need to find rms value of E.I wrote like ##u=εE^2## cause it also contains the energy of B-field.So this value is actually used for a instant time.But I think I can take is as a max value of E then ##E_{rms}=E_{max}/(\sqrt 2)##kuruman said:
Electromagnetic waves carry energy through the interaction between electric and magnetic fields. As the wave travels, the electric field creates a magnetic field and vice versa, resulting in a continuous transfer of energy.
The amount of energy carried by an EM wave is affected by its amplitude (strength), frequency (number of waves per second), and the medium it is traveling through. In general, higher amplitude and frequency waves carry more energy, while the medium can either increase or decrease the amount of energy carried.
The energy of an EM wave can be calculated using the formula E = hf, where E is energy in Joules, h is Planck's constant (6.626 x 10^-34 Joule seconds), and f is frequency in Hertz. Alternatively, E = hc/λ can be used, where c is the speed of light (3 x 10^8 meters per second) and λ is wavelength in meters.
No, EM waves do not lose energy as they travel through space. This is because they do not require a medium to travel through, unlike mechanical waves which can lose energy due to friction or absorption by the medium.
The intensity of an EM wave is directly proportional to its energy. This means that as the energy of the wave increases, so does its intensity. Intensity is also affected by the size of the wave's electric and magnetic fields, with larger fields resulting in a higher intensity.