from the air, how would i make a diagram to show the angle of incidence, refraction, and the normal?If a light ray enters an acrylic block...?
If you are looking for a sample diagram, check out:
http://en.wikipedia.org/wiki/Law_of_refr鈥?/a>
If you are looking for a free drawing program with which to create such a diagram, there are many of them out there, including trial versions of programs for which you'd normally have to pay.
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