Microwave radiation (Edexcel GCSE Physics Combined Science): Flashcards
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What type of radiation is microwave radiation?
What type of radiation is microwave radiation?
Electromagnetic (EM) radiation
Microwave wavelength vs infrared
Microwave wavelength vs infrared
Longer wavelengths
Microwave wavelength vs radio waves
Microwave wavelength vs radio waves
Shorter wavelengths
CMB full form
CMB full form
Cosmic Microwave Background Radiation
What is CMB radiation?
What is CMB radiation?
Low-frequency EM radiation from all parts of universe
What theory does CMB radiation support?
What theory does CMB radiation support?
Big Bang theory
CMB radiation origin
CMB radiation origin
Leftover energy from Big Bang
Big Bang age
Big Bang age
Around 13.8 billion years ago
Universe age in CMB snapshot
Universe age in CMB snapshot
About 380,000 years old
How microwave ovens heat food
How microwave ovens heat food
Water molecules vibrate, producing heat
Microwaves & satellite comms: atmosphere benefit
Microwaves & satellite comms: atmosphere benefit
Pass through Earth's atmosphere
Microwaves & satellite comms: weather benefit
Microwaves & satellite comms: weather benefit
Less affected by weather
Early universe state (CMB evidence)
Early universe state (CMB evidence)
Hot and dense
Universe changes since Big Bang
Universe changes since Big Bang
Expanding and cooling