Final answer:
Thin collimation results in better resolution because it narrows the beam of light, allowing for better separation and clarity of details in the image.
Step-by-step explanation:
The resolution of an image refers to the ability to distinguish between two closely spaced objects or details. In the context of this question, collimation refers to the narrowing of a beam of light. Better resolution is achieved with thin collimation because it results in a narrower beam of light, allowing for better separation and clarity of details in the image.