What wave has to have a medium to travel?
Mechanical wave
What is wavelength?
The distance of waves from crest to crest, or trough to trough.
what is a electromagnetic wave?
what is reflection
when a ray of light approaches a smooth surface and the light ray bounces back
What is a crest?
the highest point on a wave.
What is a mechanical wave?
a wave that needs a medium to travel
what is it called when sound or light hits a medium or a object and travels into a medium
absorption
What is amplitude?
the distance from the resting point of a wave to its crest.
What wave can travel through space?
a electromagnetic wave
what is refraction?
when light waves changes direction as they pass through a different medium.
What is pitch?
changes in pitch affects how high or low a sound seems
What is another name for a mechanical wave?
sound wave.
What is diffraction?
What is a trough?
its the lowest point on a wave.
What wave needs a medium to travel?
Mechanical wave.