Originally Posted by **labview1958** Applets on the net show that a larger single slit shows more maxima and minima, thus distance between fringes decreases not increases. |

Yes and it happens when you increases the width of the slit. You are, as I said, losing little by little the diffraction pattern if you increase little by little the width of the slit.

Sarigama gave you a mathematical formula that agrees with the internet applet you found.

If you have 2 minutes of free time, I strongly suggest you to watch

YouTube - Quantum Mechanics The Uncertainty Principle Light Particle's. You'll find this video very enlightening regarding your question.