Vocabulary #6

universe: everything that exist.

telescope: a device that collects light and makes distan objects appear closer and lager.

refraction: the bending of wave as they go from one substace to another.

reflection: the boucing of waves off a surface.

wavelength: the distance from one peak to the next on a wave.

frequency: the number of waves that pass through a point in a second.

electromagnetic spectrum: waves of light in order be wavelength.