A student investigated the effect of changing light intensity on pupil diameter in the eye.
The table shows the results.
Which explanation for the student’s results is correct?
1 )
A reduced light intensity reduced the pupil diameter by 75%.
2 )
A reduced light intensity reduced the pupil diameter by 25%.
An increased light intensity reduced the pupil diameter by 75%.
4 )
An increased light intensity reduced the pupil diameter by 25%.
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