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i need to know;
The procedure to be followed:
How the wavelength of the light falling on the LDR is determined:
How a measure of the intensity can be determined from the LDR:
The range of precision of any instruments that would be used:
The factors that would need to be controlled to ensure that it is a valid test:
Any safety precautions you would take when carrying out the investigation:
Particular features of the design that would ensure the accuracy and reliability of your results.

2007-04-10 11:13:43 · 2 answers · asked by chohiro 1 in Science & Mathematics Physics

2 answers

Is this what you mean?
"Light-dependent resistor (LDR) - SensorWiki
A light-dependent resistor, alternatively called an LDR, photoresistor, photoconductor, or photocell, is a variable resistor whose value decreases with"
Would have been nice to define your acronyms.
Presumably the wave length is measured with an expensive tool or by color matching.
Since it is a resistor, the more light, the lower the resistance. Information about its spectral response is also needed.
Safety: how intense is the light.

2007-04-11 16:27:04 · answer #1 · answered by Mike1942f 7 · 0 0

the well-liked approach is to place the bulb or merchandise emitting into an integration sphere. that's a around merchandise which would be opened for get entry to and could incorporate your emitter, your LDR and a uniform coating which reflects as flippantly as achievable for all wavelengths worried. (Edmond clinical Co. has a paint. you need to use 2 steel bowels to make this in the event that they are completely around with a lip that an be bolted/clamped at the same time during the try. you decide on a bulb that has been calibrated by skill of somebody with exceptional kit and can be run at a constent voltage for the period of a try. Run the easy from the mixing sphere right into a spectrometer and make a 'usually occurring' curve. Run your lamps and evaluate them. I left some thing out, did no longer I? you may desire to make some variety of variable gadget that facilitates you to view/degree one frequency of light at a time. that's the annoying section. seem at a clinical American index for a thank you to make a spectrometer. i understand they have carried out it at some time. The spectrometer output is concentrated onto your LDR and supply you a resistance replace which will mirror the quantity of light falling on it. Your LDR will might desire to be calibrated by skill of your standand easy. you would be engaged on approximately 3 calibration curves at one time to make any experience of your records. could be extra handy to pass on your interior of reach college and ask kindly for help. a uncommon highcshool might have a spectrometer and a instructor prepared to help. an truly some distance out risk is to ask a producer for a transmission curve for their bulbs. good success. you will choose it for this one.

2016-10-21 13:47:58 · answer #2 · answered by ? 4 · 0 0

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