using the diagram at 3:47, could you please explain the polarisation of light if a third polarising filter, rotated at 45º, was placed in between the two in the diagram, and hence light is able to pass all three? I am referring to Malus' law, but would like to understand it in terms of the current OCR specification (without the equation, unless it helps). thanks!
sure! So a third filter will flip back the polarisation to 45 degrees and light will be able to pass through all 3. Think of it as a polarising filter that "flips" the plane of oscillation by 45 degrees, and thus allowing light to pass through.
that is actually an immenseley complicated question to answer properly involving quantum mechanics! : ) For the purpose of polarisation - you can think of photons interacting with the atoms/electrons and getting absorbed, raising the energy of the object. Hope this helps!
I recommend having a look at energy levels first: ruclips.net/video/4Ws2A6hsrI0/видео.html This really is fundamentally a field theory question , and here is a lecture from the founder of quantum electrodynamics: ruclips.net/video/EyssfKRsgMU/видео.html Hope this helps!
This was so easy to follow and understand! Thank you
Glad it was helpful!
Awesome video and really easy to understand, but could you make a video on Malaus' law???
using the diagram at 3:47, could you please explain the polarisation of light if a third polarising filter, rotated at 45º, was placed in between the two in the diagram, and hence light is able to pass all three? I am referring to Malus' law, but would like to understand it in terms of the current OCR specification (without the equation, unless it helps). thanks!
sure! So a third filter will flip back the polarisation to 45 degrees and light will be able to pass through all 3. Think of it as a polarising filter that "flips" the plane of oscillation by 45 degrees, and thus allowing light to pass through.
How does the light get absorbed
that is actually an immenseley complicated question to answer properly involving quantum mechanics! : ) For the purpose of polarisation - you can think of photons interacting with the atoms/electrons and getting absorbed, raising the energy of the object. Hope this helps!
@@zhelyo_physics I want the complicated part of it
I recommend having a look at energy levels first: ruclips.net/video/4Ws2A6hsrI0/видео.html
This really is fundamentally a field theory question , and here is a lecture from the founder of quantum electrodynamics: ruclips.net/video/EyssfKRsgMU/видео.html Hope this helps!
@@zhelyo_physics thanks