C
Because in my opinion they do bending of a light wave as it passes at an angle from one medium to another.
Answer:
B. It is too slow to observe directly
Explanation:
They move too slow to be able to observe how they move.
I hope it helps! Have a great day!
bren~
The force of gravity is less between to objects when the product
of their masses is smaller, or when they are farther apart.
