Models and Waves
What are the main three parts of our anchor phenomena?
Phone, Speaker, Ear
How is sound made?
Sound is created by vibrations in a medium.
What is wavelength?
The distance between two consecutive crests or troughs in a wave.
What is a medium?
A substance through which waves travel, such as air, water, or solids.
What is an analog signal?
A continuous signal that varies in amplitude or frequency.
Why do we create models?
To help visualize and understand complex phenomena.
What impacts the tone and pitch of an instrument?
The size, shape, and material of the instrument.
What is the crest of a wave?
The highest point of a wave.
How did the sound change underwater compared to out of water?
Sound travels faster and may sound different underwater due to the density of the medium.
What is a digital signal?
A signal that represents data as discrete values, usually in binary code.
How does sound travel?
Sound travels as vibrations through a medium.
How does the amount of energy impact the volume of sound?
More energy creates a louder sound; less energy creates a softer sound.
What is the frequency of a wave?
The number of waves that pass a point in a given amount of time.
What does it mean to be transparent?
A material that allows light to pass through it clearly.
Why do most modern devices use digital signals?
Digital signals are less prone to interference and easier to store and process.
Which type of wave (transverse or longitudinal) is characterized as being perpendicular to the wave’s overall direction?
Transverse wave.
What is needed for sound to travel?
A medium, such as air, water, or solids.
How is amplitude related to the energy of a wave?
Higher amplitude means more energy in the wave.
What is reflection?
The bouncing back of light when it hits a surface.
What is the main advantage that digital signals have over analog signals?
Digital signals maintain quality over long distances and are less affected by noise.
Which type of wave (transverse or longitudinal) is characterized as being parallel to the wave’s overall direction?
Longitudinal wave.
What is a vacuum, and how does it impact sound travel?
A vacuum is an area without matter, and sound cannot travel through it because there’s no medium for the vibrations.
What is the relationship between wavelength and frequency?
As wavelength decreases, frequency increases, and vice versa.
Explain what happens to the colors of light when you shine a white beam on red paper.
Red light is reflected, while other colors are absorbed.
How can analog signals be converted to digital signals?
By sampling the analog signal at intervals and converting it to binary code.