C6 universe/ waves/ lights spectrums Flashcards
What are the colours of white light
Red, orange, yellow, green, blue, indigo, violet
What waves are all used for communication
Radio waves
Name the electromagnetic spectrum from longest wavelength to shortest
Radio waves Microwaves Infrared Visible Ultraviolet X- Rays Gamma
How are radio waves produced
Getting a piece of metal and making the electrons inside oscillate
What is an optical fibre
A tube of glass that allows light to travel through it
When the source moves away from the observer the observed wavelength is…… And the frequency is …..
Longer, lower
When the source movers towards the observer the observed wavelength is… And the frequency is….
Smaller, high
Which galaxies are moving fastest
The ones that appear red
How does red shift show the universe is expanding
The red galaxies are moving away because it’s red shift
What would blushift indicate
That galaxies are moving closer to earth
Redshift means that…
The frequency has decreased and the wavelength has increased
What is the Big Bang theory
A giant explosion where the earth started
What is cosmic microwave background radiation
Radiation given of by moons, planets and comets
What can be be explains for
The Big Bang theory
What is white light
Light that we can see
