A student uses a light microscope to view plant cells.
The microscope has a ×15 \times 15\,×15 eyepiece lens and a ×40 \times 40\,×40 objective lens. Calculate the total magnification of the image of the plant cells seen by the student.
A mitochondrion within one of the plant cells has an actual length of 2.4 μm2.4\text{ }\mu\text{m}2.4 μm. Use your calculated magnification from part (a) to find the length of the mitochondrion's image as seen under the microscope, in micrometres (μm\mu\text{m}μm).