DEFINE YOUR TERMS
A transverse wave composed of an oscillating electric field and a magnetic field that oscillates perpendicular to the electric field
What is the relationship between wavelength and frequency of electromagnetic waves?
They are inversely proportional. Meaning the longer the wavelength, the higher the frequency.
What are the three additive primary colors?
red, green and blue
You want to concentrate light coming from a weak light source by focusing it all on a single point. What type of lens should you use?
A CONVERGING LENS
photons
What is the Law of Reflection?
The Law of Reflection states that the angle of reflection equals the angle of incidence.
Which light waves have the highest frequency?
blue
What are the subtractive primary colors?
cyan, magenta and yellow
What is the role of the iris?
It regulates how much light gets into the eye.
What is the interaction of waves with other waves called?
Wave interference
What is the term for when light waves are redirected when they pass through particles such as dust and water?
What is scattering.
What electromagnetic waves have the longest wavelengths?
radio waves
If you make a green dot on a computer screen and then put a blue dot in the same place, what color will you get?
Since a computer screen shines light at your eyes, the colors will add, producing a cyan dot
The cone cells sensitive to low-frequency visible light send signals to the brain about what color light?
Red light
What theory of light states that light is both a photon and a wave?
Quantum-mechanical theory; this is the currently accepted theory. it was first proposed by Einstein
What do we call a material in which light passes through but makes object appear fuzzy?
translucent
Name the types of light with shorter wavelengths than visible light.
Ultraviolet light, x-rays, gamma rays
If cyan and magenta ink are mixed, what color ink will you get?
Cyan ink absorbs all colors except blue and green. So when white light shines on it, only blue and green light reflect off. Magenta ink absorbs all colors except blue and red. So a mixture of the two will absorb all colors but blue, so the ink will be BLUE.
A diverging lens has what shape?
concave, meaning the sides of a diverging lens are curved inward
Light is traveling through water and suddenly breaks the surface and travels through air. What happened to the light’s speed?
It increased because the speed of light is fastest in gases.
What do we call light that vibrates in only one direction/plane?
polarized light
Light is traveling in air and suddenly hits a glass window. What happens to the speed of the light when it enters the glass?
Light travels more slowly in solids than gases. So, the light will SLOW DOWN when it enters the glass.
If you shine red light on a yellow shirt, what color will the shirt appear? Assume the shirt color is done with dyes that use the subtractive primary colors.
Yellow absorbs all colors except red and green. So the red light will be reflected and the shirt will appear RED.
How does the human eye change how the light rays focus?
It changes the shape of the lens.
Einstein's Theory of Special Relativity states that nothing with _____ can travel faster than the speed of light.
MASS