what wrong with this sentence The purpose of the microscope was invented to allow people to see tiny things.
The purpose of the microscope was invented to allow people to see tiny things.
Was the purpose or the microscope invented?
People usually do not "invent" purposes. They think up purposes, but do not invent them.
The purpose of the microscope was invented to allow people to see tiny things.
The sentence: "The purpose of the microscope was invented to allow people to see tiny things" contains an error in the use of the verb "was invented." The verb tense is incorrect and it should be replaced with "was" or "has been."
To correct the sentence, we can rephrase it as: "The microscope was invented to allow people to see tiny things."