Green light shines through a 130-mm-diameter hole and is observed on a screen. if the hole diameter is increased by 20%, does the circular spot of light on the screen decrease in diameter, increase in diameter, or stay the same?

We are given

diameter of hole = 130 mm

If the hole diameter is increased by 20%, the circular spot of light on the screen will increase in diameter. This is one of the wave properties of light. The waves are propagated as spherical waves when going through holes.