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2 cards from this section. Quick, good the night before a test.
What is radiation?
Think of energy transfer that doesn't need air or liquid.
What is a black body?
It's a perfect absorber!
What is radiation?
Think of how heat from the sun reaches you.
True or False: A black body reflects all incident radiation.
Consider what it means to be 'black' in terms of absorption.
A star emits maximum thermal radiation at a wavelength of 500 nm. Calculate its surface temperature using Wien's Displacement Law.
Rearrange the formula to solve for temperature.
Measure the temperature of an unknown black body if it radiates 800 W of energy per unit area. Use the Stefan-Boltzmann Law to find the temperature.
Remember to use the right units and constants.
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