Sound
What kind of materials can sound waves travel through?
all matter; solids, liquids, & gases
What is the law of reflection?
The angle of incidence is equal to the angle of reflection
What is diffuse reflection?
Light rays strike a rough or uneven surface and do not form a sharp image
Where is an image formed in the eye?
At the back
What affects the amplitude of a wave?
The amount of energy it carries.
What unit is used to measure frequency?
Hertz
Light waves can travel through empty space.
Describe the surface of a plane mirror.
It has a flat surface.
Why do I see red when I look at a rose?
The rose reflects light waves with wavelengths that are red. All other colors are absorbed.
How does the pitch of a sound wave depend on the frequency of the sound wave?
The higher the frequency of the sound wave, the higher the pitch
How do vibrating objects produce sound waves?
Compressions and rarefactions
Reflect, transmit, or absorb
Describe the image of a convex mirror.
It's always right side up and smaller than the object.
How do lenses interact with light?
The layer of tissue in the eye that contains cells sensitive to light is the _____________.
Retina
Which parts of the ear are considered the middle ear?
ear drum, and three bones (anvil, stirrup, hammer)
What is the the definition of transparent, translucent, and opaque?
Transparent: almost all light passes through and forms clear image
Translucent: most light passes through but the image is blurry
Opaque: light does not pass through
Describe the image of a concave lens.
Always right side up and smaller than the object.
What is the relationship between the pupil and the iris?
The iris contracts or relaxes which affects the size of the pupil. The larger the pupil is, the more light that can enter
A film camera forms an upside-down image of a tree on the film. What is the location of the tree on the film. What is the location of the tree relative to the focal length of the lens?
The tree is farther from the lens than the focal point.
What is the function of each of the three parts of the ear?
Outer ear-->collects waves
Middle ear--> amplifies the vibrations
Inner ear--> converts vibrations to nerve signals so the brain can interpret
How do light waves make it possible for us to see?
They reflect off objects and enter our eyes.
Where does light enter the eye?
pupil
In many movies, you can both see and hear explosions that happen in outer space. Explain how this is inaccurate.
Sound waves cannot travel through a vacuum (space). You can see it, but not hear it.
What is the difference between a lens and a mirror?
A lens is a transparent object with at least one curved side that changes the direction of light.
A mirror is any reflecting surface that forms an image by reflection.