Northwestern Physics Demos                                 Go back to Light 
DCS# 6B10.15NWU# D-13Location:    5 D 4
title: Inverse Square Intensity
aka:
Inverse Square-law Model 

Description:
Illumination area change with distance is illustrated.

Question?
   This model shows distances of 1r and 2r, what would the area be at 3r?
pix of apparatus