A change in the direction of wave such as light, caused when it enters a material of different density
Frequency
The number of waves per second
Amplitude
The height of the wave above the zero line
Superposition
The overlapping of waves to give a combined effect
Crest
The point on a wave that exhibits the maximum amount of positive or upward displacement from the rest position
Trough
The opposite of a crest, the minimum or lowest point in a cycle
Electromagnetic
Electric currents or fields and magnetic fields
Wave
They transfer energy from one place to another without the need of particles
Wavelengths
The distance from peak to peak
Types of waves
Light waves are transverse, they go up and down
Sound waves are longitudinal, they move side to side
Light waves
Are electromagnetic and do not need a medium to travel through (no particles)
Water waves
Are mechanical, they need a medium to travel (water particles)
Sound waves
Are mechanical and need a medium to travel (air particles)
Light waves
Light travels in straight lines, it cannot bend or turn, light travels through a vacuum, the empty that light can pass through are vacuums, they are electromagnetic waves
