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nipiano93
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Which component E or B of an electromagnetic wave is responsible for visible effect?
clem said:It is chiefly B that induces currents in your retina.
nipiano93 said:Thank you clem! I think you are right.
@nasu
I think I can explain. The objects are visible to us because of currents induced in our retina. As the magnetic field is responsible for induction of current, it is the magnetic field that is responsible for the visibility of stuff around us.
clem said:Disclaimer: I am not an authority on the retina (except for having an occasional tear), and don't know any useful reference. My original answer really applies for a good conductor (which I maybe mistakenly considered the retina to be) where B is much larger than E. I hope more expert witnesses can resolve this discussion.
Claude Bile said:Echoing Born2bwire's sentiment; we cannot isolate the E or B fields at optical frequencies, thus we are forced to conclude that both fields play a role in optical absorption.
Claude.
;Photometry is the science of the measurement of light, in terms of its perceived brightness to the human eye.[1] It is distinct from radiometry, which is the science of measurement of radiant energy (including light) in terms of absolute power
Traditional cameras capture light onto photographic film or photographic plate. Video and digital cameras use an electronic image sensor, usually a charge coupled device (CCD) or a CMOS sensor to capture images which can be transferred or stored in a memory card or other storage inside the camera for later playback or processing.
nipiano93 said:I think I disagree. The fields can ofcourse not be isolated, but I think that both fields play separate roles. For example, take the case of polarisation. Mainly electric field is responsible for polarisation because of its larger amplitude (E=B/c).
nipiano93 said:Consider the case of a camera. What is it that enables the camera to record images? (I mean which field).
nipiano93 said:@claude bile
Hmm... strange! In my school syllabus, it is told to us that electric field is primarily responsible for polarisation.
nipiano93 said:@claude bile
Hmm... strange! In my school syllabus, it is told to us that electric field is primarily responsible for polarisation. Anyways, then could you please sum up all this to give a final answer to my original question?
Look there has to be something that is responsible for the visibility effect
An electromagnetic wave is a type of energy that is made up of oscillating electric and magnetic fields. It can travel through space and does not require a medium to propagate.
The visible component of an electromagnetic wave is the portion of the wave that is visible to the human eye. It includes the colors of the rainbow - red, orange, yellow, green, blue, indigo, and violet.
The visible effects of an electromagnetic wave are caused by the electric and magnetic fields oscillating at right angles to each other. This causes the wave to vibrate and create the visible light that we see.
The wavelength of an electromagnetic wave determines the color of the light that we see. Shorter wavelengths, such as blue and violet, have higher frequencies and therefore appear brighter, while longer wavelengths, such as red and orange, have lower frequencies and appear dimmer.
Yes, an electromagnetic wave can have components that are both visible and non-visible. For example, sunlight contains visible light as well as non-visible components such as ultraviolet and infrared light.