1. The problem statement, all variables and given/known data Visible light passing through a circular hole forms a diffraction disc of radius 0.1mm on a screen. If X-ray is passed through the same set up, what will happen to the radius of diffraction disc? 3. The attempt at a solution I'm really clueless regarding this question. I tried to find a formula for radius of the disc but I don't think I need any formulas. Can anyone please help?