a transparent front surface of the eye that acts as a lens, bending light as it enters the eye.
What is the cornea
100
a push or pull exerted on an object
What is a force
100
a traveling disturbance that carries energy from place to place
What is a wave
100
the energy transfered by electromagnetic waves
What is electromagnetic radiation
200
the speed of sound is determined by these three properties
what is
-elasticity
-density
-temperature
200
signals made by the retina travel to the brain through this nerve
What is the optic nerve
200
an object's sum of all the forces acting on it
What is net force
200
-the number of waves that pass a given point in a certain amount of time
-the higher frequency the more energy the wave will have
What is frequency
200
radio waves-with the longest wavelenghts and lowest frequencies
What are communication waves
300
how close together the particles in a medium are
what is density
300
-the rods react to small amounts of light
-distinguish between black, white, and grey
-allow you to see in dim light
What are the rods
300
-the tendancy of an object to resist change in their motion
-newtons 1st law of motion
-the amount of inertia an object has depends on the object's mass
What is inertia
300
a disturbance between two crests or troughs
What is a wavelength
300
-these waves produce vitamin D, but too much exposure can cause skin cancer.
What are UltraViolet waves
400
when a wave passes a barrier or moves through a hole in a barrier and spreads out. the reason you can hear sound around corners.
What is diffraction
400
-they resond to color
-there are 3 different kinds. ones that can see in red, blue, and green light.
-they only function in bright light
What are the cones
400
-force that pulls all objects twoards earth
-if the only force asting on an object is gravity, the object is in free fall
What is gravity
400
-the height of a wave, maximum distance moved from the rest position
What is amplitude
400
made up of the colors red, orange, yellow, green, blue, indigo, and violet.
What is visible light
500
how quickly particles in a medium go back to their rest position.
what is elasticity
500
used to fix nearsighted eyes
What is a concave lens
500
an object that is thrown
What is projectile motion
500
when a wave goes from one type of medium to another, changes speed and bends.
What is a refraction
500
all electromagnetic waves travel at the same speed but have different wavelengths and frequencies.