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P2.2/3 Infrared Radiation, electromagnetic spectrum - Coggle Diagram
P2.2/3 Infrared Radiation
A type of electromagnetic wave that can't be seen but can be felt as heat
Infrared waves are longer in wavelength than visible light waves.
All objects absorb and emit infrared infrared radiation
The higher the temp of an object, the more infrared radiation it emits at a given time.
An object that has constant temp emits radiation across a continuous range of wavelengths.
Black Body
Is an object that absorbs all radiation but it doesn't reflect any radiation.
No radiation passes through it.
The radiation emitted by a body that absorbs all the radiation incident is called Black Body Radiation
Radiation emitted from surface of objects due to their temperature
Cities will be hotter than rural areas due to more energy dissipated in urban areas
Key Points
All objects emit and absorb infrared radiation
The hotter the object is, the more infrared radiation it emits.
Blackbody radiation is radiation emitted by a body that absorbs all the radiation incident on it.
electromagnetic spectrum
Radio Waves
Microwaves
ultraviolet rays
X-rays
Visible light
All types of waves have different wavelengths of light
The sun
Emits all types of electromagnetic radiation
Earth atmosphere blocks most types of harmful radiation
Earth does not block infrared radiation or light from the sun
Hotter = Z = shorter wavelengths
Cooler = Y = longer wavelengths
