The objective lens of a compound microscope has a numerical aperture of 0.4. The maximum useful magnification of the microscope is:



400x


1,000x


10x


There is not enough information given to calculate this


the correct answer is not given

To find the maximum useful magnification of a microscope, you need to use the formula:

Maximum Useful Magnification = Numerical Aperture × 500

In this case, the numerical aperture is given as 0.4. Plugging this value into the formula:

Maximum Useful Magnification = 0.4 × 500 = 200

Therefore, the maximum useful magnification of the microscope is 200x.

The correct answer is not provided in the given options.