Microwave radiation (Edexcel GCSE Physics): Flashcards
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What type of radiation is microwave?
What type of radiation is microwave?
Electromagnetic (EM) radiation
Microwave wavelength vs infrared & radio waves
Microwave wavelength vs infrared & radio waves
Longer than infrared, shorter than radio waves
Two main uses of microwaves
Two main uses of microwaves
Cooking and satellite communication
What does CMB stand for?
What does CMB stand for?
Cosmic Microwave Background Radiation
What CMB radiation is evidence for
What CMB radiation is evidence for
Big Bang theory
When the Big Bang happened
When the Big Bang happened
13.8 billion years ago
What CMB radiation is
What CMB radiation is
Leftover energy from Big Bang
Age of universe in CMB snapshot
Age of universe in CMB snapshot
380,000 years old
How microwave ovens heat food
How microwave ovens heat food
Cause water molecules to vibrate, producing heat
Why microwaves good for satellite comms (1)
Why microwaves good for satellite comms (1)
Pass through Earth's atmosphere
Why microwaves good for satellite comms (2)
Why microwaves good for satellite comms (2)
Less affected by weather
What CMB shows about universe evolution
What CMB shows about universe evolution
Universe has been expanding and cooling