I was looking at an old question about bigger pixels and whether they make for a better picture here
Why and how do "bigger pixels" make a better picture?
and one user, Philip Kendall, says that he calculated the new sensor size from two parameters: the sensor-area-increase percentage and the fact that a pixel is 1.5 microns.
How does the pixel size here figure? How do you use it to get the dimensions of the new sensor?
Wouldn’t you just calculate the new sensor area using the increase percentage and then use the fact that its aspect ratio is 4 : 3?
I don’t get it how he got the sensors dimensions first and how he used the pixel size to determine them.