Waves
what part of the wave measures one crest to the other?
wavelength
what is the first layer of the eyeball that protects dust and germs from coming in?
cornea
which of the following forms of communication can transmit signals using sound waves, light waves, or radio waves?
morse code
true or false?
the eye produces light to detect objects so that us humans can see.
false. the eye sends and receives light but does not create it.
what happens when the light that enters the eye, and the lens doesnt refract properly.
the light would not be focused on the retina in order for the retina to send the right signals to the brain so it would make the eyes blurry.
what is the lowest part of a wave called?
trough
define pupil
hole in the eye that allows light to pass through
examples of ways humans have coded and transferred information.
light, fire, smoke, and colors
the bending of light called?
refraction
if a wave has a high frequency then its wave length would be long or short?
short
what is the amplitude of a wave?
the distance between the center line and the top or bottom of crest.
if its really dark, will your iris shrink or get bigger?
get bigger to let more light in
a system that can transmit information through electrical signals, flashing lights, or even tapping or banging of drums.
morse code
what is the function of the lens
its responsible for the focusing of light.
true or false?
high frequency means high amplitude
false, the amplitude does not change the frequency.
what is the definition of a wave?
a pattern of motion that transfers energy through a medium.
where in the eye is light converted into electrical signals and sent to the brain?
the retina
which of the following are needed for two people or two devices to communicate effectively?
a. pattern
b.a sender
c.a recipient
d.a message
e.all of the above
all of the above.
the steps of how light enters the eye
enters through the cornea, the cornea refracts light through the pupil, then light passes through the pupil and gets refracted by the lens and then focuses on the retina, then the retina converts image to the brain and the signals go through the optic nerve to the brain
if you had a rubber ducky and you started to create waves. where would the rubber ducky go?
it would move up and down but would not move forward, because waves do not move matter, but it does transfer energy.
what kind of wave vibrates our eardrums so we can hear?
sound wave
which part of the eye lets light focus on the retina?
the lens
how do cellphones communicate with eachother. say the steps.
first it converts sound waves to radio waves that sends to the other phone and converts back into sound waves that people can hear.
what is myopia
when you can see objects close up but cannot see them far away
lets say you were making waves with rope tied to a tree, if you were to wave the rope at a fast pace. what happens to the amplitude? What happens to the frequency?
the frequency increases and the amplitude does not change