Transcript COLOR •The Atomic Color Code - Atomic Spectra •Color by Transmission •Color Filters Lab.

COLOR
•The Atomic Color Code - Atomic Spectra
•Color by Transmission
•Color Filters Lab
The Human Eye
• There are three kinds of color-sensitive receptors in the
human eye:
 Red-sensitive receptor
 Green-sensitive receptor
 Blue-sensitive receptor
When all three of these colors are sensed,
we experience the color white.
However, if an alien with different colorsensitive receptors senses these colors,
they probably won’t experience the color
white.
The Color Spectrum
• The spread of colors from white light when
passed through a prism or diffraction
grating.
– Red, Orange, Yellow, Green, Blue, Violet
The Atomic Spectra
Every element has its own
characteristic color when made
to emit light. This characteristic
color is composed of a variety of
different frequencies of light
(colors).
The Atomic Spectra
We can find out which colors make up the characteristic color of
an element with a spectroscope.
Spectroscope: An instrument used to separate the light from a
light source into its different colors.
The Atomic Spectra
The image that a spectroscope produces is called the spectrum
of an element and appears as a series of colored lines. Each line
corresponds to a distinct frequency (color) of light. Such a
spectrum is known as a line spectrum.
The Atomic Spectra
Each different element produces a different line spectrum.
So, if you know what the line spectrum looks like, you can
identify the element.
Diffraction Grating
• A device that is
used to separate
colors of light
Color by Transmission
• Deals with transparent, colored objects.
• The color of a transparent object depends on the
color of the light it absorbs and transmits.