I am curious if this really gives consistent results. I had the impression that modern mobile phones do all kinds of non-linear "corrections" attempting to give the most pleasing image, so the absolute R,G,B pixel values are not necessarily directly related to just that one point on the image, but everything else in the image too, and possibly even the recent history of image frames as well, if the phone is attempting to compensate for what it believes is the currently-present ambient lighting?
I think it is important to recognised that the method can only be semi-quantitative. It is quite dependent on local light conditions - I would recommend doing all of your calibration and measurement in the middle of the day in a relatively short period of time. Students who did their experiments during sunset/evening and/or had a gap of a couple of hours or more between measurement found their data to be much less reliable
Test tubes might work but you’d have to be a lot more careful about positioning them - the readings you get will be influenced a lot by the curvature of the tube, so unless you are confident the tube is in exactly the right place each time your data might not be very useful. Cuvettes are square so have flat sides that you don’t have to be quite so careful about
very nice , can you please help tell , can i use this for Gems Spectrometer
Awesome - this is great thank you Katherine :)
Thanks for sharing, it is wonderfully simple and amazingly useful!
I am curious if this really gives consistent results. I had the impression that modern mobile phones do all kinds of non-linear "corrections" attempting to give the most pleasing image, so the absolute R,G,B pixel values are not necessarily directly related to just that one point on the image, but everything else in the image too, and possibly even the recent history of image frames as well, if the phone is attempting to compensate for what it believes is the currently-present ambient lighting?
I think it is important to recognised that the method can only be semi-quantitative. It is quite dependent on local light conditions - I would recommend doing all of your calibration and measurement in the middle of the day in a relatively short period of time. Students who did their experiments during sunset/evening and/or had a gap of a couple of hours or more between measurement found their data to be much less reliable
How to plot spectrum in respect to wavelenght
Great video. Thanks.
Thanks for sharing this fantastic method, helps me a lot
Can I just use test tube instead of quivet
Test tubes might work but you’d have to be a lot more careful about positioning them - the readings you get will be influenced a lot by the curvature of the tube, so unless you are confident the tube is in exactly the right place each time your data might not be very useful. Cuvettes are square so have flat sides that you don’t have to be quite so careful about
Really❤❤ u are my idol 😊😊
Very cool! Thanks!!