Chapter 12 - Light Flashcards
Materials that absorb and reflect light
Opaque
Materials that transmit light but also scatter it
Translucent
Materials that transmit light without scattering it
Transparent
Property of a material that indicates how much the speed of light in the material is reduced compared to a vacuum
Index of Refraction
An image of a distant object produced by the refraction of light through air layers of different densities
Mirage
Objects can ____, _____, and _____ light.
Absorb, Reflect, Transmit
Light waves always follow the Law of __________.
Reflection
Reflection can be ______ or _______.
Regular, Diffuse
Refraction occurs when light changes _______ in moving from one ______ to another at an angle.
Speed, Material
Different wavelengths of light are refracted by ________ amounts.
Different
Transparent material that selectively transmits light
Filter
Colored material that is used to change the color of other substances.
Pigment
The color of an object depends on the wavelengths of ______ they reflect.
Light
_____ and _____ cells are light-sensitive cells found in the human eye
Rod, Cone
(+ or o) The color of a filter is the color of the light that the filter transmits.
+
All light colors can be created by mixing the primary colors: _____, ____, and ______.
Magenta, Cyan, and Yellow
What are the primary light colors?
Red, Blue, Green
What are the primary pigment colors?
Magenta, Cyan, Yellow
Generated by heating a piece of metal until it glows
Incandescent Light
Generated by using phosphors to convert UV radiation to visible light
Fluorescent Light
One wavelength, one direction, constant distance
Coherent Light
more than one wavelength, can travel more than one direction, no consistancy
Incoherent Light
______ and ______ lightbulbs are often used in homes, schools, and offices.
Incandescent and Fluorescent
When electrons collide with neon gas, ____ ____ is emitted
Red Light
A ________ bulb is brighter and hotter than an ordinary lightbulb
Tungsten-Halogen
Lasers emit _____ beams of coherent light.
Narrow
Light with a magnetic field that vibrates in only one direction
Linearly Polarized Light
Technique that produces a hologram
Holography
For this to occur, light must travel slower in the 1st medium and must strike the boundary at an angle greater than the critical angle
Total Internal Reflection
Device that reads instensities of reflected light and converts the info to digital signals
Optical Scanner
