Homework Help: physics

Posted by marc on Monday, May 12, 2008 at 8:23pm.

A lamp is moved from 26 cm to 90 cm above the pages of a book. Compare the illumination on the book before and after the lamp is move.

physics - DrBob222, Monday, May 12, 2008 at 8:40pm
The illumination varies as the inverse square of the distance..
1/(26)^2
1/(90)^2
physics - shrily, Wednesday, May 1, 2013 at 5:39pm
.00148
1.234e-4

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