- #1
Fosock
- 3
- 0
Hey dudes and dudettes, loving the forum here. Will be around quite a bit for the next year or so hopefully..
Just a quick question, any help would be appreciated so much..
I'm doing my A2 main coursework, that's the one you do when you're 18 for all the American types, and was wondering if any of you could kindly help a struggling physicist..
Basically, my coursework is shining various lights (lasers, lamp, UV, IF, etc) through various medians and seeing how it effects light intensity.
Doing my preliminaries, I was playing around with a lamp and some glass blocks. After adding 5 blocks, it was all going smoothly. The voltage reading was increasing, meaning resistance was dropping, meaning the LDR was receiving less light, meaning Fosock was a damn happy camper right now. Nice little pattern going on there as well.. why can it never stay fine?!
I added a sixth block, and the reading in volts went down.. meaning more light was making it to the LDR. Added a seventh glass block, yet more light was making it..
So I was wondering.. what do you reckon this is down to? Can TIF be something to do with it, as I've only heard of it in optical fibre so far.. Can it be something to do with the light being in and out of phase where its sometimes reflected by the glass blocks edges? Or would you just blame the quality of the glass blocks, maybe imperfections deflect the light?
I'm leaning towards it being in and out of phase.. Check this out.
Light :block: :block: :block: :block: :block: LDR
^^^^^^^^^^^^
Some light is reflected at each block, some makes it through. This gives a different time gap for each wave of light, rather than a constant flow, yeah?
Light :block: :block: :block: :block: :block: :block: LDR
^^^^^^^^^^^^^^^^
Is it possible that this has simply delayed the light that little bit more to make it start going back into phase again?
Any help would be received lovingly, pretty much my entire A2 mark depends on nailing this quickly.. I'm going to go on to tougher stuff in this coursework, yet I'm struggling over Prelims right now..
I love you all, thanks for any help..
Fosock
Just a quick question, any help would be appreciated so much..
I'm doing my A2 main coursework, that's the one you do when you're 18 for all the American types, and was wondering if any of you could kindly help a struggling physicist..
Basically, my coursework is shining various lights (lasers, lamp, UV, IF, etc) through various medians and seeing how it effects light intensity.
Doing my preliminaries, I was playing around with a lamp and some glass blocks. After adding 5 blocks, it was all going smoothly. The voltage reading was increasing, meaning resistance was dropping, meaning the LDR was receiving less light, meaning Fosock was a damn happy camper right now. Nice little pattern going on there as well.. why can it never stay fine?!
I added a sixth block, and the reading in volts went down.. meaning more light was making it to the LDR. Added a seventh glass block, yet more light was making it..
So I was wondering.. what do you reckon this is down to? Can TIF be something to do with it, as I've only heard of it in optical fibre so far.. Can it be something to do with the light being in and out of phase where its sometimes reflected by the glass blocks edges? Or would you just blame the quality of the glass blocks, maybe imperfections deflect the light?
I'm leaning towards it being in and out of phase.. Check this out.
Light :block: :block: :block: :block: :block: LDR
^^^^^^^^^^^^
Some light is reflected at each block, some makes it through. This gives a different time gap for each wave of light, rather than a constant flow, yeah?
Light :block: :block: :block: :block: :block: :block: LDR
^^^^^^^^^^^^^^^^
Is it possible that this has simply delayed the light that little bit more to make it start going back into phase again?
Any help would be received lovingly, pretty much my entire A2 mark depends on nailing this quickly.. I'm going to go on to tougher stuff in this coursework, yet I'm struggling over Prelims right now..
I love you all, thanks for any help..
Fosock