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I am doing a science project for school and am about 90% sure that I would like it to be in the field of light dispersion (of rainbows). I have done some research on it, but I am indecisive about what the variable should be, that would create the more advanced and better project. I could change the size of the drops, take a digital picture of it, and measure the changes of the angle (between the incoming ray and refracted ray) on the computer. Or, the variable could be liquid, and I could observe how different indices of refraction affect the same angle as above. A third choice I have is to change the drop size, but I do not know how to do this precisely. A last project I am debating over could be to see how any one of the above variables affects the brilliance of rainbows. I am open to any suggestions or new ideas. Thank you!
Question Date: 2004-09-18
Answer 1:

I am not sure how you would go about changing the drop size, and using multiple fluids could be problematic, so I would just change the angle.

Answer 2:

I'm not clear what your experiment is, but it sounds like you could change the drop size easily enough by using a dropper to drop 1, 2, or 3 drops on a spot to change the 'drop' size.

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