Model No. OS-9498
Pinhole Viewer
6
®
Activity 3:
Examining the Relationship between the Number of Pinholes
and the Image
Note: This activity must be performed in a dark room.
Procedure
1.
With the exception of the pinhole in the center, set up the apparatus as instructed in the
"Equipment Setup" section.
2.
Place four very small pinholes on the foil in the shape of a 1-inch square.
3.
Turn on the incandescent bulb. Turn off the room lights.
4.
Hold the Pinhole Viewer parallel to the tabletop.
5.
Observe the image on the screen and record your observations.
6.
Rotate the Screen counterclockwise and describe any changes to the image on the screen.
7.
Rotate the pinholes counterclockwise by turning the outer tube. Describe any changes to the
images.
Analysis
1.
Explain the effect of multiple pinholes.
2.
Draw a ray diagram to support your reasoning.
Equipment Required
Part Number
Pinhole Viewer assembled
OS-9498
Incandescent light bulb or equivalent
Push-pin
