Definitions
Electromagnetic wave
A transverse wave composed of an oscillating electric field and a magnetic field that oscillates perpendicular to the electric field
converging lens
focuses all light on a single point
If you look down in a pool and see a quarter 5 feet in front of you. Where is the coin: at 5 feet away, before the 5 feet mark, or further beyond 5 feet? WHy?
As the light leaves the pool water, it bends and causes a false image. The quarter is actually closer to you than the 5 feet mark.
What happens when light hits an aquarium for the first time?
some of the light is reflected, but the rest continues through the aquarium through refraction with the light bending closer to the perpendicular
(Be able to draw this phenomenon)
If magenta and cyan are mixed, what color ink will you get?
blue
Law of Reflection
Angle of reflection equals the angle of incidence
How does the eye change its focus
changes the lens shape
Name some characteristics of electromagnetic waves
they have different wavelengths, they carry energy, they do not have the same frequencies, they do not require a medium in which to travel, they can travel through empty space
Transparent
When light passes through an object
If yellow and cyan ink are mixed, what colored ink will you get
green
Translucent
when light passes through and object but makes the object appear fuzzy
diverging lens
causes light rays to move away from each other and to not converge at a single point
If light is traveling through a window pane, as it leaves the window pane, what is the speed of the light/
It speeds up. It travels the slowest in solids and the quickest in gases.
What happens when light has been traveling through the water of an aquarium an exits the aquarium?
Part of the light reflects back into the water, but the light exiting the aquarium bends at a greater angle from the perpendicular
(Be able to draw this phenomenon)
If a computer places a green, red, and blue dot on top of each other, what color will you see?
white
Polarized
Light only vibrates in one direction
Opaque
When light passes through an object and the light is absorbed or reflected
Which light wave has the highest frequency?
red light, orange light, indigo light, green light
indigo light
Scattered
•Light rays passing through molecules or particles and they redirect the light waves
If a re light is shined on a yellow shirt using subtractive colors, what color will the shirt appear?
red,
Yellow absorbs all colors except red and green. so the reflection will be red
Current theory of light
Light is made of individual packets called photons which are made up of two transverse waves. One wave consists of an oscillating electric field and one that is made up of an oscillating magnetic field
Light travels the fastest in what state of matter
gases
Which has the shortest wavelength?
gamma rays, microwaves, x-rays, or infrared light
gamma rays
If a computer places a green dot over a yellow dot, what color will you see?
yellow
If I mix cyan, yellow, and magenta ink, what colored ink will I get?
Black