Terminology
It is the name given to incident radiation landing on an object
What is Irradiation?
It is the name of the electromagnetic spectrum between 300nm and 1100nm
What is visible light?
It is the total steradian observed by a solid sphere
What is 2 pi?
What is the total heat emitted from a 1 meter diameter black body disc that is at 25 Celsius?
702 Watts
It is the body part where a shrimp's heart is located.
It is the unit associated with solid angles
What is a steradian?
It is the law that describes the spectral emission of an object based on its temperature
What is Plank's Law?
It is the rule of view factors that allows you to find the inverse view factor of a know view factor
What is reciprocity?
What is the solid angle subtended by a standard movie screen (10m wide x 7m tall) for an audience member 25 meters away?
1.4 Sr
Microvophobia is the name for having this irrational fear of this common object
What is of microwave ovens?
What is radiosity?
It is the black body temperature that most closely resembles the electromagnetic spectrum of the Sun
What is 5,500K?
It is law that relates the absorptivity to the emissivity for a radiating body at steady-state
What is Kirchhoff's Law of radiation
Find the view factor for parallel and square flat plates that are each 1m on a side and 2 meters apart.
~0.07
It is the only U.S. State to NOT have a McDonald's restaurant chain
Who is Vermont?
It is the name given to an imperfect black body that has a constant emissivity
What is a gray object?
Calculation: What is the fraction of emitted power from a 1,000K object that falls between 0-10um?
91.4%
This number equals 1,361 W/m^2
What is the solar constant?
A 0.5 meter diameter solid sphere needs to emit 500W thermal energy at a temperature of 500K, should the surface by black, amorphous, or polished?
Polished (emissivity of 0.18)
It is the name given to a group of penguins in the water
What is a raft?
It is the name given to a perfect reflector of incident radiation
What is a white object?
Calculation: What is the wavelength at peak emissive power for a 483K object?
6 um?
Thought Question - To maintain hot coffee after 20 minutes - is it better to add cream first or last?
Add cream first!
A 1 meter square solar panel in a space application receives 200 W/m^2 irradiation from the sun on one side and radiates heat to empty space on the other. What is the steady-state temperature of the solar panel?
243 K
It is the commonly accepted temperature of a lightning bolt
What is 30,000 degree Celsius