Question

How does single-slit interference affect a double-slit experiment?
What you call "single slit interfernce" is just the way the light spreads out from a single slit due to diffraction.

In a double-slit experiment, there is interfence between the two separate beams diffracting from each slit. Light spreads out at an angle determined by single-slit diffraction, but there are light and dark bands due to two-slit interference
Each double slit is in itself a single slit. That's why you see a "modulating" single slit pattern over the double slit pattern

Related Questions

A student sets up a laser and screen and a single slit and observes the diffraction pattern. They th... mean: a double-slit interference experiment is set up in a laboratory using a source of blue monochr... A double-slit experiment is performed with light from a Helium Neon Laser on two slits 80 micromete...