To determine the total magnification when using a microscope, you need to multiply the magnification of the eyepiece by the magnification of the objective lens. Here's a step-by-step solution:
1. First, identify the magnification power of your objective lens, which is denoted as 40x.
2. Next, identify the magnification power of your eyepiece, which is denoted as 15x.
3. To calculate the total magnification, multiply the magnification of the objective lens by the magnification of the eyepiece:
[tex]\[
\text{Total Magnification} = \text{Objective Magnification} \times \text{Eyepiece Magnification}
\][/tex]
4. Substitute the known values into the equation:
[tex]\[
\text{Total Magnification} = 40 \times 15
\][/tex]
5. Perform the multiplication:
[tex]\[
40 \times 15 = 600
\][/tex]
Therefore, the total magnification when using the microscope with a 40x objective lens and a 15x eyepiece is 600x.