Microwaves Waves of water Light waves Sound waves
- Slides: 19
– – Microwaves Waves of water Light waves Sound waves Hopefully not this one…
• A wave is a disturbance or movement that transfers energy through space or through matter – Ex: sound waves transfer energy through air
• Energy is the capacity to apply force over a distance • A force is a PUSH or a PULL on an object
Let’s look at a wave of water: • The rest position (equilibrium position) is shown by a line. • The highest point is called the crest • The lowest point is called the trough
• The wavelength is measured from crest to crest or trough to trough. • Wavelength is a distance and it is measured in metres.
• Amplitude is the height of a crest or depth of a trough measured from the rest position. • Ex: A big wave with a high crest and low trough has a large amplitude.
• The rise and fall of each wave is called an oscillation or a vibration. • Frequency is the number of repetitive oscillations that happen in a given time. • It is usually measured in Hertz (Hz) or cycles per second.
• A water wave moves energy (not matter or water). • Energy is carried forward by the water wave. • If you are sitting on an inner-tube in the lake, the wave passes underneath you. • The water does not move forward.
• The matter that waves travel through is called a medium. • Ex: sound waves travel through air – Air is the medium • Ex: ocean waves travel through water - Water is the medium
• 1) Transverse Waves – Matter in the medium moves up and down perpendicular to the direction that the wave travels (ex: waving a rope) • 2) Compression Waves – Matter in the medium moves back and forth along the same direction that the wave travels (ex: sound waves)
Compression
Did you know? ? • Not all waves need a medium…light waves in space can travel through the emptiness of space (there is no matter at all!) • But sound waves DO need a medium to travel through which means there is no sound in space!
- Water and water and water water
- Electromagnetic song lyrics
- Light is electromagnetic radiation true or false
- Mechanical waves and electromagnetic waves similarities
- What type of waves are sound waves? *
- Sound is a longitudinal wave
- Light light light chapter 23
- Into the light chapter 22
- Light light light chapter 22
- What are microwaves
- What molecules are microwaves most attracted to
- What are microwaves repelled by
- Interference of microwaves
- Micro waves uses
- Microwave at target
- Properties of microwaves
- Bart believes that mice exposed to microwaves
- Images of microwaves
- Microwaves definition science
- Introduction to microwaves