The Ray Model of Light Flashcards
What is the particle model of light?
The particle model was create by Sir Isaac Newton, and imagines light to be a stream of tiny particles traveling in lines until they reach the eye.
What is the ray model of light?
The ray model of light represents light as a straight line that shows the direction of the light wave’s travels.
What is optics?
Optics is how light moves.
What does your vision depend upon?
Your vision depends upon the amount of light entering your eye.
How does matter affect light?
The type of matter in an object determines the amount of light it absorbs, reflects, and transmits.
What does transparent mean?
Transparent is when light can travel through a matter freely. Window glass is transparent when you can see clearly through it.
What does translucent mean?
Translucent is when most light rays get through but they are scattered in many directions. Objects cannot be seen clearly, like through frosted glass.
What does opaque mean?
Opaque means light cannot pass through the matter, like a wall. The matter absorbs and reflects light, but no light passes through.
How is a shadow formed?
A shadow is formed because the light rays are blocked by the object
How can the size of a shadow be determined?
The size of a shadow is a relationship between the distance of the object from its light source.
If you have two shadows from the same shape object, what can you tell about the distance between the object and the light source?
The larger shadow is cast by the object that is closer to the light source.
Why is paper not a mirror?
Paper is not a mirror because microscopically it is a rough surface and a mirror must be totally smooth to reflect all light.
what is an incident ray?
An incident ray is the initial ray of light coming in towards the mirror.
What is a reflected ray?
A reflected ray is the ray that bounces off the mirror.
How are the angles of incident and reflected rays similar?
The angle of incidence and reflection are equal.
