👉Waves!! 👈
👇Learning Targets
Students will describe waves,
Students will compare different types of waves
👀Special Vocabulary
Wave : Is a repeating disturbance that transfers energy through matter or space.
Medium: Is matter through which a wave travles.
Mechanical Waves: Such as sound waves, are waves that can travel only through matter.
Electromagnetic Waves : is a wave that is capable of transmitting its energy through a vacuum (i.e., empty space).
Transverse Waves : Particles in the medium moves back and fourth at right angles to the direction that the wave travels.
Longitudinal Waves : Matter in the medium moves back and fourth along the same direction that the wave travels.
Surface Waves : Is a wave in which particles of the medium undergo a circular motion
Transverse & Longintudinal Waves
Transverse waves are particles in the medium that move back and fourth at right angles to the direction that the wave travels.
Longitudinal waves are matter in the medium that move back and fourth along the same direction that the wave travels. They are similar because they have a frequency (and therefore a period), and a wavelength. that can be calculated.
And they can both be electromagnetic or mechanical waves.
🏊Example of a transverse wave ~ Slinky, ocean wave, light wave, seismic wave
👂Example of a longitudinal wave ~ Slinky, sound wave
Mechanical & Electromagnetic Waves
Electromagnetic waves are light waves. They are energized particles that travel very quickly. They do not need a medium to travel, which means that they can travel through outer space where there is no matter.
Mechanical waves are waves that require a medium (matter) to travel.
Both EM and mechanical waves have a frequency and a wavelength. The wavelength is the velocity divided by the frequency.
Both EM and mechanical waves can carry energy from one A to B without anything except the wave physically moving from A to B.
🏊Example of a mechanical wave ~ Water wave, sound wave.
☀Example of a electromagnetic wave ~ Light wave, radio wave, x-rays, micro waves.
Surface Waves
In a surface wave, particles move in circles.
Surface waves occur at the boundary between two different mediums.
Example ~ Most ocean waves are caused by wind blowing across the water. Moving air molecules transfer some of their energy to molecules of ocean water. The energy travels across the surface of the water in waves. The stronger the winds are blowing, the larger the waves are and the more energy the waves have creating huge surface waves.
