4b. How has the letter ‘e’ changed with the 40X objective compared to its appearance with the 10X objective?5a. Define field of view (FOV). Use a metric ruler to complete the following. mm * 1000 = um; um * 0.001 – mm5b. What is the FOV with the 4X objective in millimeters (mm)? ; in micrometers (um)? 5c. What is … Show more… Show more Biology Science Microbiology BIO 250SCI Share QuestionEmailCopy link Comments (0)