Cross word Tesa Harris made this

Light that is bounced off the surface of an object
light is trapped by matter
the distance from crest to crest or trough to trough of a wave
a kind of liberation that allows energy to move from one place to another
allowing light to pass through without scattering it (glass)
not allowing light to pass through
allowing some light through but scattering it
the angle at which light enters a surface
the angle at which light reflects off of a material
produced with out humankind
produced by humankind
an object that produces light
the dark inner part of a shadow
the part of a shadow that allows some light to pass through
lens with both sides curving outward
lens with both sides curbing in
the unit used to describe the intensity of a sound
the amount of energy a sound has. aptitude measured the intensity of a sound
how fast a wave is traveling. This depends on wavelength and frequency
the change of light speed or bending of light as it enters different mediums or materials
because light travels in a straight ling, the angle of incidence equals the angle of reflection
how high or low a sound seems. Low pitch sounds have low frequencies, high pitch sounds have high frequencies
low frequency sounds below 16 Hz. or 16 vps. Elephants and whales use infrasonic sound to communicate
High frequency sound above 16,000 hertz. Bats dogs and cats can hear ultrasonic sound. Doctors use ultrasonic waves t create s sonogram
a number that tells how much light speed changes in a medium or material
the height of a wave measured from the top half or bottom half of the wave.
type of wave where particles moves up and down while the wave moves forward. Light an radio waves are traverse waves