Light travels in __________.

Light waves only travel up and down.

The speed at which a wave vibrates is called ________.

________ is the measure from peak to peak.

_______________________ is the measure from the start of the wave to one peak.

This is the part of the spectrum that we can see.

When light bounces off an object it is said to be ______.

Objects that do not allow light to pass through are said to be _____

_____ happens when light pass through one medium to another medium.

When light refraction happes one could think of the light as being _______.

When light bends around an object or through an opening _______ happens.

The base unit for light. (a bundle of excited electrons)

What kind of light has a slightly shorter wavelength than visible light?

Objects that allow some light to pass through are said to be ...

Which of these has the highest frequency?