system
Given the following post, respond as if you're commenting on Reddit:
human
In the double and single slit experiment how small does the slit have to be before we notice the diffraction and interference patterns?

Does it depend on the radius of the beam of light as well?
gpt
For a really pronounced effect, the slits should be somewhere in the order of the wavelength of the light moving through it (hundreds of nanometers to micrometers) but technically any slit size will have some interference effects.

This does not depend on the size of the beam of light.