Presentation on theme: "Create a False Color image You can transform electromagnetic radiation from one frequency to another frequency."— Presentation transcript:
Create a False Color image You can transform electromagnetic radiation from one frequency to another frequency
The electromagnetic spectrum includes a wide range of frequencies of electromagnetic radiation. The human eye can only see the visible light. Colors can be used to represent electromagnetic radiation that we can not see. http://chandra.harvard.edu/photo/false_color.html
Meteorologists use radar to study the reflection of radio waves from raindrops or snowflakes so that they can determine rates and types of precipitation. http://science.nasa.gov/headlines/y2007/02mar_rainandsnow.htm
Reflected radio waves are not visible to the human eye. Different colors of visible light can be used to represent different amounts of reflected radio waves. This results in a false color image of precipitation rates and amounts used in weather reports. http://www.google.com/webhp?hl=en
Changes in the way that ice causes radio waves to scatter can be used to determine the age of ice. http://eosweb.larc.nasa.gov/HPDOCS/misr/misr_html/beaufort_sea_ice.html
Your Remote Sensing Design Challenge Build a model of a remote sensing satellite. Calibrate your model. Create a model of a landscape using different colors of construction paper. Use your model of a satellite to analyze light reflected or emitted from the landscape. Create a false color image by representing one color of visible light with a different color of visible light. Create a landscape from a set of remote sensing data.
The key component of a model of a remote sensing satellite is a light emitting diode (LED). http://electronics.howstuffworks.com/led.htm
LEDs can emit and detect light. LEDs are usually used to emit light of a specific wavelength. LEDs can also transform light into an electrical signal.
The frequency of light that a LED detects is similar to the wavelength of light the LED emits. The voltage produced by the LED is proportional to the intensity of the light detected by the LED. http://mvh.sr.unh.edu/mvhinvestigations/light_investigations.htm
Is heavy rainfall really red? What king of electromagnetic radiation was used to produce the image with different colors of visible light? http://www.google.com/webhp?hl=en
You used a model of a remote sensing satellites to construct a false color image of a landscape. What is a false color image? How was your false color image of a landscape similar to a false color image of precipitation used in weather reports? How was your false color image of a landscape different from a false color image of precipitation?