Temporal coherence very easy to understand and plot time vs intensity how to graphically represent spatial coherence ? That would make me understand spatial coherence better ! Still I didn't get why the separate term spatial coherence is used ? It's like same intensity vs distance for which the coherence occurs in space like temporal we presented in a graph like plotting time against intensity in space ?
In the spatial coherence section, why do we not see the pattern anymore after a certain separation of the slits? And how is that distance related to the expression for the coherence area given by the van Cittert-Zernike theorem?
@ 8:09 I don't like the very first formula here. Why indicate a difference in frequency with a delta, and why isn't there a delta when you're dealing with a difference in time? Coherence-time really is a period of time, not a moment in time!
7:08 You start with a light source emitting photons yet you end up with no signal at the end. This experiment violates the law of conservation of energy. Amazing.
Note that the light is split at a beam splitter. If it interferes destructively at the detector, then it will interfere constructively back to the light source. Therefore the energy is conserved.
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Very well explained!
Temporal coherence very easy to understand and plot time vs intensity how to graphically represent spatial coherence ? That would make me understand spatial coherence better ! Still I didn't get why the separate term spatial coherence is used ? It's like same intensity vs distance for which the coherence occurs in space like temporal we presented in a graph like plotting time against intensity in space ?
thank you very much, very well explained
Thank you!
thanks professor
Dankeschön!
In the spatial coherence section, why do we not see the pattern anymore after a certain separation of the slits? And how is that distance related to the expression for the coherence area given by the van Cittert-Zernike theorem?
Exact my doubt and question !
@ 8:09 I don't like the very first formula here. Why indicate a difference in frequency with a delta, and why isn't there a delta when you're dealing with a difference in time? Coherence-time really is a period of time, not a moment in time!
7:08 You start with a light source emitting photons yet you end up with no signal at the end. This experiment violates the law of conservation of energy. Amazing.
Note that the light is split at a beam splitter. If it interferes destructively at the detector, then it will interfere constructively back to the light source. Therefore the energy is conserved.
Thanks. This was very helpful and clear.
I guess it's pretty randomly asking but do anybody know of a good site to stream newly released tv shows online?
@Titan Ronnie flixportal =)
@Remy Melvin Thanks, I went there and it seems like a nice service :) I appreciate it!!
@Titan Ronnie You are welcome =)