Glad it was helpful!

That is with paint. When you mix paint you are decreasing the number of colors that can bounce back to your eyes. Paint sucks up some colors so if you mix to many colors you get black. But light doesn't work that way. If gets brighter rather than darker when you mix it.

Due to the Essential Physics e--Book's interactivity, it's available for viewing in a web browser and not as a PDF. If you have your school's access code, you can get to the e-Book at education.pasco.com/.

If you record video in Capstone itself (say, synced with sensor data or for video analysis), the video is embedded and saved within the .cap file itself for the convenience of needing to manage only one file. If you'd like to get a copy of the video out of Capstone to use elsewhere, right-click on the border of the video display in Capstone and select the "Save Movie As" option.

Thanks for your kind feedback. We're glad to be of help.

It was standard household liquid bleach, which in our location is typically a 6% sodium hypochlorite solution.

The known concentrations of the reference solutions can be entered in the upper table before, during, or after their absorbances are measured. The unknown concentration in the lower table can be entered only after its absorbance is measured.

PASCO Capstone's FFT (or Fast Fourier Transform) Display analyzes data to show amplitude vs frequency. You can see the FFT Display demonstrated in this video at [4:32} and you can learn more about it here in PASCO Capstone Help: help.pasco.com/capstone/how-do-i/display-and-analyze-data/fft-display/.

​@@pascoscientific but how can I find the amplitude of my position-time graph? In the X axis I get the frequency, for the Y axis I only get position, velocity and acceleration which are from the motion sensor, I don't get the amplitude. Should I type a formula for the amplitude? Adjusting my graph I get: x_{(t)}=-0.01e^{-0.01t}\sin (14.02t-2.76)+0.23

You might try using the PASCO Capstone Calculator's "amplitude" function to create a new data set which picks off the peaks of your position-time data, as demonstrated in this video: kzbin.info/www/bejne/aYnSd3-Noq2YeJI

Card 17 uses a standard yellow pigment, while card 18 uses a fluorescent yellow pigment, which you can see fluorescing in blue light at [5:26].

@@pascoscientific Does that mean that one card is a pure 580nm yellow and the other card is a combined red/green type yellow?

Brown is usually described as a low-brightness orange. So you might try first getting orange like you see at [1:28] with the mix of red and green lights and then turning down the intensity of both.

While the adjustable focal length lens is included with the OS-8477A Human Eye Model, it's also available separately as the OS-8494 Adjustable Focal Length Lens: pasco.com/product/OS-8494.