====== Diffraction Grating Film ======

{{tag> diffraction spectrum spectrography untagged located}}

<WRAP box right>
{{rsz_photo.jpg?400|}}

// //
</WRAP>

===== Description =====

diffraction grating films with 1000 lines/mm   
 Project laser beams through the grating film, the single light source will be diffracted into several sub light source, with equal distance ( angle ) in between them.



Theorem behind it :  Diffraction can create "rainbow" colors when illuminated by a wide spectrum (e.g., continuous) light source. This phenomenon is caused by the interference effects in reflections from the closely spaced transmissive layers. A grating has parallel lines, while a CD has a spiral of finely-spaced data tracks. Diffraction colors also appear when one looks at a bright point source through a translucent fine-pitch umbrella-fabric covering. Decorative patterned plastic films based on reflective grating patches are very inexpensive, and are commonplace.  

For more Information please visit the [[ http://en.wikipedia.org/wiki/Diffraction_grating |  wiki page]]

===== Purpose =====



===== Apparatus =====



===== Setup =====



===== Notes =====



<WRAP group>
<WRAP half column>

</WRAP>
<WRAP half column>

</WRAP>
</WRAP>


<WRAP box>
<WRAP centeralign> // Demo room information // 
</WRAP>
<WRAP tablewidth 100%>
| **Location** | B4 |
| **Maker** | Unknown |
| **Current State** | Working |
</WRAP>
</WRAP>