Light Flashcards
We see this as color a brightness, actually electromagnetic radiation, partly electric, partly magnetic, flows in a straight line
Light
How do we make light?
Yeahhhhh…. You know this (have Maggie explain it to you if you don’t know)
What are the primary colors when we’re talking about LIGHT?
Red, Blue, Green
Answer these (we’re speaking of LIGHT)
Red + Blue =
Red + Green =
Blue + Green =
Red + Green + Blue =
Red + Blue = Magenta
Red + Green = Yellow
Blue + Green = Cyan
Red + Green + Blue = White
This makes up light
Photons
The Speed of Light
(meters per second) =
(miles per second) =
(meters per second) = 300,000,000
(miles per second) = 186,000
How long does it take for a light wave to travel from the sun to the Earth?
8 minutes
How far is the sun?
93,000,000 miles
When a wave strikes an object and bounces off
Reflection
What is the ray hitting the surface when we’re talking about reflection called?
Incident ray
What is the ray bouncing off the surface when we’re talking about reflection called?
Reflected ray
This kind of reflection has smooth surfaces
Specular Reflection
This kind of reflection has rough surfaces
Diffuse Reflection
The angle of incidence equals the angle of reflection. The incident ray, reflected ray, and the normal ray lie on the same plane.
Law of Reflection
When all light is reflected into the denser medium
Total Internal Reflection
The bending of waves when passing from one medium to another
Refraction
The bending of waves around a barrier
Diffraction
Glass or plastic made up of many tiny parallel slits, may also be reflective
Diffraction Gratings
When the crest of one wave meets the crest of another one
Constructive Interference
When the crest of one wave meets the trough of another one
Destructive Interference
