What Is Light? (5min)

Usually, when we say "light" we mean

• visible light

• radio waves

• infrared light

A hydrogen atom compared to a cent is about the same comparison as a cent to the ________

• Earth

• Moon

• oxygen atom

What makes visible light special?

• the energy is more

• nothing

Why do we think eyes can see the visible spectrum instead of radio waves or gamma waves?

• Eyes evolved in water and water propagates the visible spectrum

• It was a random coincidence.

Where does light come from?

• Electrons use electricity to create light

• Electrons move from a higher state of energy to a lower one.

Does light accererate?

• yes until it reaches "c" or the speed of light.

• No, at the very instant of it's creating it moves at "c" or the speed of light.

Light is a form of _________________________.

• matter

• energy

• element

Light can behave as a ______________.

• particle

• wave

• wave and particle