Point and Diffused Light Sources.
P.I.R.A. #: 6B10.30
Illustrates: Umbra and Penumbra shadows.
Description: Use 100 W frosted bulb for diffuse source and a point source. Use 6" diameter aluminum grounding ball from Van de Graaff for object. Project shadows on wall or screen.
Size: 16" h x 40" w
Notes: Best when projected onto a screen.
Hazard: None.
Condition: Good.
Instructor Comments
