Waves
What is vibration?
When something vibrates it wiggles back and forth very quickly.
Paper
solid
Transverse? Yes or no
Yes! They move up and down like a wiggling rope!
Longitudinal? Yes or no
Yes, they move by squishing and stretching as the air
Solid, liquid and gases are??
Mediums!
What is a medium?
Solid Liquid or Gas
Orange juice
liquid
What can light waves travel through?
Vacuums (ex: space)
Amplitude
Measure how tall a wave is
Crest
Highest point of a wave
What is a vacuum?
A space where it is completely empty, no air or matter.
Water Vapor
Gas
Do you need a medium to have light waves?
No! This is how we can see the sun through space (which is a vacuum).
Do you need a medium to have sound waves?
Yes, either a solid (a drum), a liquid (a whale call) or a gas (train whistle)
Trough
Lowest point of a wave
What is a wave?
A disturbance that moves energy from one place to another.
Farts
Gas
Example of Light Waves
Sun, flashlight, screen, phone, projector, light-bulb, etc.
Example of Sounds waves
Frequency?
number of waves that pass by a certain point in one second