Electro-magnetic Radiation and Cresting Amplitude

Thread starter Marc Meilleur
Start date Dec 24, 2011
Tags

Amplitude Radiation

AI Thread Summary

In electro-magnetic radiation, the cresting amplitude is variable and not proportionate to the wavelength. It is independent of the wavelength and primarily relates to the power the wave carries. For visible light, the amplitude corresponds to the brightness perceived. Understanding this relationship is crucial for applications in optics and telecommunications. The amplitude's variability highlights its significance in different contexts of electromagnetic wave behavior.

Dec 24, 2011

Marc Meilleur

In electro-magnetic radiation is the cresting amplitude proportionate to the wavelength; or is it the same for all wavelengths, or is it a variable?

Physics news on Phys.org

Dec 24, 2011

jtbell

Staff Emeritus

Science Advisor

Homework Helper

The amplitude is variable, and independent of the wavelength. It's related to how much power the wave carries, and for visible light it's related to the brightness of the light.

Thread 'Motional EMF in Faraday disc, co-rotating magnet axial mean flux'

So here is the motional EMF formula. Now I understand the standard Faraday paradox that an axis symmetric field source (like a speaker motor ring magnet) has a magnetic field that is frame invariant under rotation around axis of symmetry. The field is static whether you rotate the magnet or not. So far so good. What puzzles me is this , there is a term average magnetic flux or "azimuthal mean" , this term describes the average magnetic field through the area swept by the rotating Faraday...

View full post »

Thread 'Why measure the speed of light in one direction?'

It may be shown from the equations of electromagnetism, by James Clerk Maxwell in the 1860’s, that the speed of light in the vacuum of free space is related to electric permittivity (ϵ) and magnetic permeability (μ) by the equation: c=1/√( μ ϵ ) . This value is a constant for the vacuum of free space and is independent of the motion of the observer. It was this fact, in part, that led Albert Einstein to Special Relativity.

View full post »