In this case why is not good to tilt the microscope?

Tilting the microscope can lead to misalignment of the optical components, resulting in distorted images or loss of focus. It may also cause mechanical stress on the parts, potentially damaging the microscope or affecting its calibration. Additionally, tilting can disrupt the stability of the specimen slide, making it difficult to observe details accurately. Proper positioning ensures optimal viewing conditions and preserves the integrity of the microscope.