Science question

which objective lens should you use first when using the microscope to view a slide? why?

The first objective lens that someone should first use to view a slide is the 4x magnification objective lens.

Explanation:

This is because the 4x magnification objective lens has got the lowest magnification power. This in turn means that it has the highest field of view. This in turn makes it easier to locate the specimen first before switching to lenses with higher magnification power for focus after finding the location of the specimen.