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Conclusion

The hypothesis that colored glass will filter and block the laser pointer beam is disproved. The laser beam is monochromatic because it has a very narrow band of light wavelength. If the color of the glass filter does not match the wavelength of the laser beam, it will not affect the power of the laser beam.

The laser was invented in the 1960s and it has found applications in defense, medicine, consumer products, industrial applications, entertainment and research. Bar code scanners used in supermarkets, laser printers and CD players all use laser technology. The laser is also used in medicine for surgery, eye treatment, skin treatment and dentistry. Lasers are also used in various industries for cutting and welding and they are also used by law enforcement agencies and the military to mark targets and guide munitions.
 

Also consider

Try to repeat the experiment by using other color laser pointers like yellow or orange colors.
The experiment can also be done by passing the laser through a beaker filled with colored solution.

References

Laser - http://en.wikipedia.org/wiki/Laser

How lasers work - http://science.howstuffworks.com/laser3.htm

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Complexity level:
9
Project cost ($):
Time required:
1 hour to prepare, 1 hour for observation
Material availability:
Easily obtained from a hobby store
Safety concerns:

The colored glass will filter and block the beam of the laser pointer.