Double Slit Experiment: Red Laser vs Green Laser

[dalcde]

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?

 

[billschnieder]

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.

 

[BruceW]

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.