- A slit on the OHP glass produces a narrow beam of light that is diffracted by a grating sheet held in front of the head.
- For best results, darken room.
(use coffee cup holder and 2 small binder clips to hold grating on head)
| 6D20.20 PROJECT SPECTRA WITH GRATING |
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(use coffee cup holder and 2 small binder clips to hold grating on head) |
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