Science - color and light
Spectrum
A continuous range of colors of light. The visible spectrum of light consists of colors that can be seen by the human eye, red, orange, yellow, green, blue indigo, and violet
Light
A form of energy that travels in waves that a human eye sees as visible light
Rainbow
A multicolored arch of light separated into bands of color that appear when the suns rays are reflected by droplets of mist or rain
afterimage
A phantom image that remains in the visual field after the visual stimulus that caused it has been removed. The color of the phantom image is complimentary to the color of the visual stimulus
Persistence of vision
A phenomenon of sight whereby an image remains in the visual field for a fraction of a second after the visual stimulus that caused it has been removed
Visible spectrum
A range of wavelengths in the electromagnetic spectrum that humans can see
Proportion
A relationship between quantities, the amount of one thing compared with the amount of another
Chromatography
A scientific technique for separating substances. Paper chromatography separates solutions into bands of color along a strip of absorbent paper
Prism
A solid transparent object with parallel ends of equal shape, and sides that are equal parallelograms. A prism separates lights that passes through it into a spectrum of colors
filter
A substance or device that prevents certain things from passing while letting others through
Pigment
A substance that causes matter to appear colored by absorbing certain colors of light that strike it and reflecting others
ROY G BIV
Acronym of the colors of the visible spectrum of light - Red Orange Yellow Green Blue Indigo Violet
Electromagnetic Spectrum
All the types of electromagnetic waves; listed in order of wavelength
Transparent
Allowing light to pass through so the objects on the other side can be seen clearly
Translucent
Allowing some light through, not clear or transparent
Mirage
An illusion caused by the refraction of light rays
What creates a rainbow
As white light passes through raindrops, the raindrops act as prisms refracting the light.
Opaque
Blocking light so that images cannot be seen through it
What conclusion can you make about colored filters
Colored filters allows certain colors of light to pass through while other colors are absorbed. Using more than one filter is like mixing colors of pigment. A darker color results as more colors are absorbed and/or subtracted
Three dimensional
Describes something that has three dimensions, length, width and depth
Monocular vision
Involving or using sight through one eye
What is the electromagnetic spectrum
It includes all the light there is including what we can see and what we can't see. Visible spectrum is all we can see.
Why are objects certain colors
Objects contain pigment that absorb some colors from white light and reflect others
How can proportion and concentration effect coloring
Proportion is the amount of pigment mixed with other pigment. Concentration affects coloring by making them darker when concentration is diluted
What will the human eye detect when viewing a red mark on a white piece of paper using a red filter? What about a green filter?
Red F + Red M = Red Red F + Green M = Black Green F + Red M = Black Green F + Green M = Green
What pigments can be used to make the colors of blue red or yellow
Since blue red yellow are primary colors, only blue red yellow can make primary color. No other mixing can make primary colors.
concentration
The amount of something in a given space
complimentary color
The color see as an afterimage of another color, complimentary colors are opposite each other on the color wheel
What is the visible light spectrum
The colors that are combined to make white light. These are the colors we see. A prism can be used to separate these colors
When color water is absorbed by blotter paper, what colors are most soluble
The colors that are mostly soluble (blue) travel farthest and those less soluble don't travel as far.
Wavelength
The distance of one wave crest to the next or from one wave trough to the next
Chromatogram
The image formed by the separation of substances through chromatography
White light
The light from a light source such as the sun, a flashlight or a light bulb, The mixture of wavelengths of various colors that appear colorless, like sunlight
Trough
The lowest point in a wave
Crest
The top of a curve or a slope. The top part of something that slopes or rises upward like a wave
Reflect
To bounce off a surface
Absorb
To keep from passing through, to swallow up or take in
Refract
To redirect or bend from a straight path. Light gets refracted (bent) at the point of contact as it travels from one medium to another
How do pigments effect the colors we see/why do you see different colors
When light shines on an object, the pigment absorbs all colors except the color of the pigment. That color gets reflected. White - all colors reflect. Black - all colors absorbed.
What is the color of sunlight
White light
Where does color come from
White light --- refracts --- exposes ROY G BIV
Image
a picture of an object formed when light rays that bounced off that object pass though a lens or reflect off a mirror
binocular vision
involving or using sight with both eyes