Hi there,(adsbygoogle = window.adsbygoogle || []).push({});

How would I go about solving this particular problem:

What I'm trying to find out is if I have 200 points on a screen, half of which go through slit 1, and the other 100 go through slit 2. Half of those that go through slit 1 are coded as erasure 1, and the other 50 coded as erasure 2. Likewise with those points going through slit 2. The maximum swap from one erasure to another is topped at a maximum of half of those - i.e. 100 erasure 1 points -> only half (50) can be swapped to erasure 2, and vice versa with erasure 2 -> erasure 1 swaps. I'm trying to calculate the maximum of points going through slit 1 and slit 2 that can be swapped when the erasure points are swapped, i.e. slit 1 erasure 1 point swapped to slit 1 erasure 2; slit 2 erasure 1 swapped to slit 2 erasure 2, etc etc.

When erasure 1 is swapped to erasure 2, points from slit 1 and slit 2 can be swapped to erasure 2 - trying to find the maximum that is allowed from each slit when BOTH swaps (erasure 1 -> erasure 2 + erasure 2 -> erasure 1) occur. How many from each slit can be swapped? Is it 1/4 of those going through each slit (1/4+1/4=1/2->1/2 the 200 points overall)?

**Physics Forums | Science Articles, Homework Help, Discussion**

Dismiss Notice

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Personal Maths Question Trying To Solve

**Physics Forums | Science Articles, Homework Help, Discussion**