Detailed Instructions: In this task, you are given a question and answer for that. The answer will fill in the blank or will complete the unfinished question. Your task is to provide an explanation based on the given question or fill-in-the-blank statement, and answer.
Q: Question: If Mona is an astronomer and she is looking through a telescope, what happens to the amount of light gathered by the telescope if she shortens the exposure? 
 Answer: decreases
A:
The longer the exposure, the more light that the telescope can gather to make the image.