Spray-painting asteroids could prevent Earth collision

The video explains how altering the way an asteroid reflects sunlight can change its orbit due to the Yarkovsky effect, which acts like a rocket thruster. By painting the asteroid, its path can be altered to prevent a collision with Earth. Painting it white reduces the effect, while black increases it.

What is the significance of the asteroid's collision path with Earth?

Explain how painting an asteroid white or black would impact the Yarkovsky effect.