This person concluded that a beam of light behaved the same as a stream of particles that all moved in the same direction. He was the first person to perform serious scientific investigations of light.
Who is Sir Isaac Newton?
The Dutch mathematician and physicist Christian Huygens found that light traveled differently than what was originally thought. His theory.
What is the wave theory?
This theory of light indicates that light travels in tiny packets of waves.
What is the quantum-mechanical theory of light?


DAILY DOUBLE!!! Where this occurs in the body.
Daily double answer: Where is "In the lens of the eye"
The Light sensitive cells in the retina send electrical messages down the optic nerve to the brain.
What are the rods and cones?
Nothing with mass can travel faster than 300,000,000 meters per second.
What is the special theory of Relativity?
yellow, indigo, red, green.
Einstein's theory of what causes the gravitational force. Space bends in the presence of an object with mass.
What is the general theory of relativity?
(hint: reference point)