waves
What are waves
A disturbance that carries energy
This causes sound waves
vibration
Which type of wave signal is considered higher quality and more reliable?
Digital
What happens to energy when waves bounce off of surface
Some gets absorbed and energy decreases
3 examples of electromagnetic waves
radio, microwave, infrared, visible light, ultraviolet, x-ray, gamma
This type of wave needs a medium/matter to travel in
mechanical waves
What are at least 2 advantages of digital signals?
Higher quality sound, higher quality images, signals send better over long distances, require less circuitry (devices can be smaller)
What happens to energy when a wave is absorbed?
It spreads out in the material and the energy of the wave decreases
What type of electromagnetic wave carries the most energy?
Is it's frequency high or low?
Gamma, high frequency
Draw and label a wave with a crest and a trough
answer
Draw the law of reflection
Picture
Example of mechanical waves
sound waves, water waves, seismic waves
Why does sound travel fastest in a solid?
The particles are closer together and are able to transfer energy to each other more quickly.
This is the maximum distance the particles of a wave vibrate from resting position
What is amplitude
What is a material that would be good at reflecting waves?
Hard surfaces: Mirrors, metal, etc
What are 2 things that impact the amount of energy a sound wave carries?
Amplitude and frequency
These types of waves can travel through empty space/through a vacuum
Electromagnetic waves
Draw and label a analog signal and a digital signal
answer
What is a material that is good at absorbing waves?
Soft materials: Cloth