Test 2 is tomorrow (Wednesday, 8/3). Play with these problems for some practice:
1. Determine the charge due to a cluster of one million electrons.
2. If the one million electron cluster (from above) were 0.5-m from a half-million cluster of protons, what force would exist between them? (Calculate this.)
3. Consider a convex mirror (f = -0.25 m). A 10-cm tall object is 0.5-m in front of it. Find:
a. the location, type (R or V), magnification, and orientation (up or down) of the image
4. Consider a red laser (632nm) hitting a diffraction grating (1000 lines/mm). Find the separation (on a wall, 1-m away) between the central image and the n=1 image.
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