Eyes
What part of the eye does light enter through?
Pupil
What do we call it when light enters an object, but is not transmitted?
Absorption
What are the four components of the model that depicts how we see something?
light source, object, straight path between object and eye, eye
What two distances determine the size of a shadow?
Distance between light source and object and the distance between the object and surface
What travels faster than the speed of light?
Nothing
What is the body's sight receptor?
Eye
What do we call it when light bounces off an object?
Reflection
What is a model?
A simplified representation of a phenomenon
What do we call the absence of light on a surface otherwise illuminated?
a shadow
Who is the scientist that first tested the speed of light?
Galileo Galilei
What part of the eye determines the colors that we see?
Cones
What do we call it when light passes through an object?
Transmission
What are two characteristics of a good model?
simple and accurate
What 3 things determine the shape of a shadow?
The shape of the object, the orientation of the object with respect to the light source, the orientation of the surface on which the shadow appears
What was needed to determine the speed of light?
a very large distance between the light source and observer
What part of the eye acts like a muscle to expand and contract to control for the amount of light that enters?
Lens
What is the path that light follows through space?
A straight line
How can we adapt our light model to account for shadows?
Place the object between the light source and a surface
What is the name of the shadow cast by earth towards the moon on a lunar eclipse?
Umbra (or Penumbra)
What is it called when light bends as it passes through a material?
Refraction
What part of the eye carries a signal to the brain for processing?
Nerve cells
What is another name for light?
Electromagnetic radiation
What is the purpose of a model?
To communicate a phenomenon and to economically test a hypothesis
What celestial object casts a shadow on the sun during a solar eclipse?
Moon
Why is a fiber optic internet connection faster than cable?
Fiber optic uses photons (light) to transmit signals, whereas cable uses electrons.