Double Slit Experiment: Red Laser vs Green Laser

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SUMMARY

The discussion centers on the effectiveness of red versus green lasers in the double slit experiment. A participant attempted the experiment with a green laser but failed, while another succeeded with a red laser. It is established that the color difference between red and green lasers does not significantly impact the experiment's outcome, as the wavelengths of red and green photons are only slightly different. The failure of the green laser experiment may be attributed to insufficient intensity rather than the wavelength.

PREREQUISITES
  • Understanding of the double slit experiment
  • Knowledge of laser types and their wavelengths
  • Basic principles of wave-particle duality
  • Familiarity with experimental setup and measurement techniques
NEXT STEPS
  • Research the principles of wave-particle duality in quantum mechanics
  • Learn about the properties and applications of different laser types
  • Explore the impact of laser intensity on experimental outcomes
  • Investigate common pitfalls in conducting the double slit experiment
USEFUL FOR

Students conducting physics experiments, educators teaching quantum mechanics, and hobbyists interested in optics and laser applications.

dalcde
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I tried to do the double slit experiment at home with a green laser (for a science project at school and for fun). I failed but someone succeeded with a red laser. Is it true that a red laser works better because it has a longer wavelength?
 
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dalcde said:
I tried to do the double slit experiment at home with a green laser (for a science project at school and for fun). I failed but someone succeeded with a red laser. Is it true that a red laser works better because it has a longer wavelength?

No, that is not true. Unless you provide some description of your experiment setup nobody will be able to tell you why it failed.
 
If you and the other person did everything else the same in the experiment, then maybe your laser was not intense enough...
The difference due to the colour will be negligible, since the wavelengths of red and green photons are only very slightly different.
 

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