What If I have a simple experimental setup for Fraunhofer diffraction of say a rectangular aperture, with a laser source and get the Fourier transform on a screen(without any kind of lenses).Now I introduce a converging lens in front of the illuminated aperture and I get the same result but at...
I was reading about this Fourier transforming property of lens,when I came by the experimental setup for Fourier optics(with laser and a 4f correlator system).Part of the setup was that of Fraunhofer diffraction and we get the Fourier transform of the aperture at the focal point of first lens...
That explains "what" stimulated emission is. I am not able to understand "why" it happens that way.
As you stated ' the photons trigger the other yet to decay atoms to release coherent photons'.
The book I am reading gives a vague idea about what happens.
It states that-
In stimulated emission...
I was reading about LASER production when I came by the concept of stimulated emission.
The book I was reading doesn't elaborate the topic much,so far I have understood what stimulated emission is but not how it happens.
When a photon strikes an excited atom the atom falls to it's ground state...
My understanding of the paradox is that,it's a paradox in special relativity since STR only deals with flat spacetime and here our disc is showing non euclidian geometry,so the concept won't fit into STR.
Can the ehrenfest paradox be resolved using STR or does one require to go in general theory?
If it can be, please recommend a book or online source which explains it from the basics.
Also I'm somewhat unclear on what exactly the paradox is,does it state that-
Since the ratio of it's...
Oh,okay. Thanks by the way now I am atleast clear with what rms is.
Now if I want my bulb to glow brighter I should not use pure ac nor pure dc but a combination of both(equally).
Thank you.
Now if we go by the exact mathematical definition of rms-
Rms value of a function f(t) with period T
Some formula in which we integrate the function with limits 0 to T and take the avg over T
In case of the sine wave of the output half wave rectifier -
We integrate with limits 0 to...
Yes I have studied calculus and integrals but not Fourier analysis.
Can I interpret the equation like -
The rms value is a resultant of ac component and the dc component,similar to resultant of vectors,like we do it in a phasor diagram?
This is not my homework,I just came by the term ripple factor when I was studying rectifier circuits and then they just mentioned that ripple factor for a half wave rectifier is 1.21, just the value no derivation,nothing.So I started exploring the topic and I had these questions.The above...