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"I sent CoolStuff to a new teacher I'm
mentoring. I use CoolStuff all the time and love it. The kids love it and learn from it!"
~ Dixie D. from Texas
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Lab #27.6
Light: Pinhole Image
Purpose
In this activity,
students will investigate the
operation of a pinhole “lens”
and compare it to the eye.
Discussion
The image
cast through a pinhole in a
pinhole camera has the
property of being in clear
focus at any distance from
the pinhole. That’s because
the tininess of the pinhole
does not allow overlapping
of light rays. (The tininess
also doesn’t allow the
passage of much light, so
pinhole images are normally
dim as well.) When a pinhole
is placed at the center of
the pupil of your eye, the
light that passes through
the pinhole forms a focused
image no matter where the
object is located. Pinhole
vision, although dim, is
remarkably clear. In this
activity, you will use a
pinhole to see fine detail
more clearly.
Required Equipment
3" x 5" card,
straight pin , meter stick
Download
Student Worksheet
Teacher Notes
Return to Lab Menu
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The "3 x 5
cards" and "Straight Pins" required for this lab
are available from your local
office supply store. Each lab
group would need access to one
of each see lab detail for
specific use. |
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