How can you direct the fired proton's path downward?

a.

Place an electron above the original path

c.

Place a proton below the original path

b.

Place a proton above the original path

d.

Place a proton directly on the original path

B. Place a proton above the original path

Explanation:

Like charges would repel one another. Unlike charges would attract.

When the proton is placed above the original path, it repels the fired proton and thereby goes downward.

The correct answer is "Place a proton above the original path".

Explanation:

Proton pathways are used in different physical applications for medical and diagnostics systems such as proton-computed tomographies and other radiologies. A way to modify a fired proton's path downwards in these systems is to place another proton above the original path. Protons repel each other in the opposite direction for having the same charge, therefore, a proton placed above the path of another proton would change its path downward.