Here's why:-The diaphragm in a compound microscope controls the amount of light passing through the specimen. It's like an iris in your eye, adjusting the amount of light that enters.-The objective lens is responsible for magnifying the image of the specimen.-The diaphragm doesn't directly increase the size of the image. It helps to adjust the brightness and clarity of the image, making it easier to see details.HOPE IT HELPS! HAPPY TO HELP!#CarryOnLearning