Question

What happens to the field of view in a compound light microscope when the total magnification is increased? Why?

Answer 1

In compound microscope, the field of view(FOV) become decreases when total magnification is increased.

It is happen because :-

The diameter of the field in an optical microscope is expressed by the field-of-view number. This means how much of a specimen is visible at any given time in the lateral plane. It is perpendicular to the optical axis.

FOV is inversely proportional to the magnification which means when the magnification increases, the FOV decreases. The size of the FOV or the diameter of the visible circle of light is equal to the field number (FN) of the eyepiece which divided by the magnification of the objective lens (measured in millimeters).

Field of View = Field Number (fn) / Objective Magnification (Mo)

This means the specimen appears larger with a higher magnification because a smaller area of the object is spread out to cover the field of view of our eye.