Apr 20th 2017, 01:24 PM
Join Date: Apr 2017
I don't understand diffraction
So, I learned about diffraction in physics class, and I must say it's a bit of a mystery to me.
Here's the deal: I was told whether or not a wave diffracts through a gap in an obstacle depends on the size of the obstacle relative to the wavelength.
However, given a wave is technically a succession of signals: what if a single signal is sent towards that obstacle? If it's alone, it therefore doesn't have a wavelength, right? So does it diffract or not?
And if the answer is yes, why would it be different if we sent two of these signals, one after the other? Why would the two signals not simply both diffract one after the other?
If the wavelength between these signals is the right size, it would mean none of them would diffract, somehow? But that must mean these two signals interract with eachother? Which is just... Not the case.
So yeah, maybe I just haven't understood **** to waves, anyway please help.