If you observed two features on a slide with your naked eye that were 0.5 mm, how far apart would they appear to be if you observed them with the microscope in front of you, using the second objective?

The correct answer is - 50 mm apart.

Explanation:

A microscope have objective lens to magnify the distance to look far apart. These objectives lenses are 3 to 4 in number in the microscope. The magnification power of these lenses are 4x, 10x, 40x and 100x powers in order.

As it is mention above the second objective lens has magnification of 10x power which means the reflection would be 10 times. With coupled with 10x of eye piece.

So the total magnification = 10x10 = 100x

 thus, it will appear, 0.5 x 100 = 50mm apart.

Thus, the correct answer is - 50 mm apart.