Final answer:
To determine the magnification of the objective lens when the total magnification is 950X and the ocular lens is 10X, divide the total magnification by the ocular magnification. The calculation reveals that the objective lens has a magnifying power of 95X.
Step-by-step explanation:
If a microbiologist is studying a specimen at a total magnification of 950X, and the ocular lens has a magnification of 10X, we can calculate the magnifying power of the objective lens using the formula for total magnification. Total magnification is the product of the magnifications of the ocular lens and the objective lens.
The formula is:
Total Magnification = Ocular Magnification × Objective Magnification
Therefore:
Objective Magnification = Total Magnification / Ocular Magnification
Plugging in the known values:
Objective Magnification = 950X / 10X
Objective Magnification = 95X
So, the correct answer is (a) 95X.