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Black Body Radiation - Coggle Diagram
Black Body Radiation
Temperature and Radiation
Hotter Object
Emits more radiation per second
Higher Temperature
Higher frequency radiation
Higher Temperature
Shorter wavelength radiation
Higher Temperature
Greater energy transfer
Applications
Electric heaters
Light bulb filaments
Stars
The Sun
Thermal Equilibrium
Object absorbs energy
Temperature increases
Object emits more than absorbs
Temperature decreases
Object emits = absorbs
Temperature constant
Colour and Temperature
Cool Objects
Appear red
Hotter Objects
Appear yellow
Very Hot Objects
Appear white
Black Body
Perfect absorber of radiation
Perfect emitter of radiation
Objects and Radiation
All objects emit infrared radiation
All objects absorb infrared radiation
Stars
Behave approximately as black bodies
Colour indicates temperature
Red star
Cooler
Blue-white star
Hotter
Exam Ideas
Temperature increases
Peak wavelength decreases
Temperature increases
Radiation intensity increases