Newton's laws of gravity.
A set of predictable rules.
The ten commandments.
The principles of motion.
Bounced off objects.
Hit the eye.
Spun faster or slower.
Hit each other.
Red, yellow, blue, green, orange, violet, indigo
Red, green, blue, cyan, magenta, yellow, black
Red, blue, yellow, purple, green, orange, brown
Red, orange, yellow, green, blue, indigo, violet
Using a cracked prism.
Putting a second prism in front of the spectrum.
Reflecting the spectrum back through the prism.
Putting a second prism in front of just the red light.
Modern scientific world view.
Destruction of the Catholic Church.
Nobel Prize for physics.
Invention of the light bulb.
Here's an interesting quiz for you.