3 ms·Correct. And since the beryllium mirrors are 8 times harder than steel, it's probably a tough job.by entrep 5y agoCorrect. And since the beryllium mirrors are 8 times harder than steel, it's probably a tough job.jacquesm 5y agoNot really. They are quite thin and the deformation is minute, on the order of less than a micron at the largest point.jacquesm 5y agoEdit: that should have been 10 micron.