Study Physics Chp. 14 Review Flash Cards

 
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Physics Chp. 14 Review

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What determines how much energy (i.e. how dangerous) a light wave has?
its frequency (energy increases as you go across the em spectrum)
What does the amplitude of light determine?
brightness
What does the fequency of light determine?
color
What equation expresses the relationship between the frequency and wavelength of a wave?
v = λf
What equation do you usually use to answer how far or how long light travels?
v = ∆x/∆t
What are examples of objects that produce polarized light?
anything LCD
What happens when you rotate a polarizing filter while looking at polarized light?
light and then dark and then light...
What happens when you rotate a polarizing filter while looking at unpolarized light?
same brightness (which is half of the light without the filter)
What is polarized light?
light whose crests and troughs are in only one plane
What color do you get when yo mix red, blue, and green lights?
white
What color do you get when you mix blue and green lights?
cyan
What color do you get when you mix red and green lights?
yellow
What color do you get when you mix red and blue lights?
magenta
What are the primary colors of pigments?
cyan, magenta, yellow
What are the primary colors for light?
red, green, blue
What are the properties of the image in a convex lens?
same as a concave mirror
close: upright, larger, behind mirror
far: upside down, smaller, in front
What are the properites of the image in a conave lens?
same as a convex miror
upright, smaller, behind
What are the properties of the image in a convex mirror?
upright, smaller, behind
What are the properties of the images in a concave mirror?
close: upright, larger, behind mirror
far: upside down, smaller, in front
What the properties of the image in plane mirrors?
upright, same, size, behind the mirror
How do you measure the incident and reflected angles of light rays?
You measure them with respect to the normal (the line that is perpendicular to the surface)
If light reflects off a surface, what is the relationship between the light right rays before and after they hit?
they are equal
What type of materials exhibit diffuse reflection?
materials with rough surfaces. Any material where you cannot see your image.
What is diffuse reflection?
reflection where light bounces in multiple directions.
What type of materials exhibit specular reflection?
materials with really smooth surfaces. Typically, anything you can see your reflection in.
What is specular reflection?
reflection where light bounces in one direction.
What are the parts of the Electromagnetic spectrum in the order of lowest to highest frequency?
radio-mircowaves-infrared-visible light-ultraviolet-x rays-gamma rays
What medium does light travel fastest? Slowest?
fastest in a vacuum
slowest in a solid
What is the speed of light?
3 x 10^8 m/s
What type of wave is light?
Transverse
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