Show:
Light
Light
Sound
Sound
Human Ear
100
What are the primary colors?
Green, red and blue
100
When ligh strikes an object, many things can happen depending on it's shape and material. Objects generally fall into 3 categories. Name them and what they do with the light.
Opaque objects do not let ligh pass through. Translucent objects let some light go through dependig on wavelenghts. Transparents objects let light pass through.
100
What is sound?
Sound are wave vibrations passing through a medium and let molecules move.
100
How fast does sound travels through air and water?
Air- 330m per second. Water- 1500m per second.
100
Where are the sound waves collected?
Sound waves are collected by the ear auricle or pinna.
200
What is refraction?
Refraction is when light speeds up or slows down in different mediums.
200
What is the speeds light travels?
300,000 km per second.
200
How does sound change speed in different mediums?
Sound travels faster in more dense mediums. Sound travels slower in less dense mediums.
200
What is the amplitude, crest and through
Amplitude is the height of the wave Crest is the highest point of a wave Through is the lowest point of a wave
200
What is the step after the ear drum vibrates?
The small bones amplify the vibrations.
300
What is a medium?
A mediam is whatever the light travels through.
300
What is it called when white light is split up?
Despersion
300
How come sound is not able to travels through a vacuum?
Because there are no molecules to vibrate.
300
What happens to the volume when the frequency is high, and what happens to the volume when the frequeancy is low?
When the frequency is higher, the volume becomes louder when we hear it. When the frequency is lower, the volume becomes quieter when we hear it.
300
What does the cochlea do with the vibrations? What does the auditory do after that?
The choclea turns these vibrations into electrical signals. After that the auditory nerve takes the signals to the brain.
400
What are ligh filters?
Light filters are used to absorb some wavelegths of ligha and let others pass through.
400
Explain how light can bend when it travels.
When ligh travels through objects, it's speed can change depending on the density of that object. Higher densities deflect light's path from the normal, more than lower densities.
400
What is frequancy and what is it measured in?
Frequancy is a measure of how many wavelenghts pass by in a given time. It is measured in Hertz (Hz).
400
What are oscilloscopes and what do they show?
Oscilloscopes are machines used to measure sound waves and visualzes them on a screen. They can show amplitude, wavelenghts and frequently at a singe moment or time.
400
Aside from hearin, for what three other things is the ear important for?
- Detecting an object's location - Maintaining balance - Subconsciously detecting and observing our surroundings
500
Why do dyes turn black when you add them together?
Dyes absorb colors, so when two dyes are mixed even more colors are absorbed, which causes the dye to get black.
500
What are the 2 lens catagories and how does it refract light?
Concave- When light travles through a concave lens, ligh is refracted away from the center line. Convex- When ligh passes trhough a convext lens, ligh is refracted towards the center line.
500
What happens to the wavelengths and pich with a higher and lower frequancy?
Higher frequancy has more wavelenghts and a high pitch. Lower frequancy has less wavelenths and a lower pitch.
500
What does period mean?
Period means the time it takes one wavelenght to pass.
500
Name all the parts of the human ear, tell whether they are in the outer ear, middle ear or inner ear.
Outer Ear 1. Auricle/Pinna 2. Ear Canal Middle Ear 3. Ear Drum 4. Auditory Bones Inner Ear 5. Cochlea 6. Auditory Nerves 7. Semicircular Canal