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fisics igcse 2 - Coggle Diagram
fisics igcse 2
space fisics
orbit a star
enough mass it's gravity pulls it sphere
have grav pull to clear away similar size objects
mercury venus earth mars jupiter saturn uranus neptune
stars powered by nuclear reactions that release energy
stable stars(sun): nuclear fusion of hydrogen into helium
so hot matter exits plasma
star life cycle
1 more item...
light year=distance of light in 1 year
9.5x10^15
orbital speed=speed of planet orbit around star
distance/time
gravity pulls stars=galaxy
big bang theory
light from other galaxys seam to have lower frequency than expected
stars are moving away from us
big band continues expantion
mass of universe compressed into single point
rapid expantion
13.8 bil y old universe
dispersion of light
light can be split into spectrum(prism etc)
rainbows
red,orange,yellow,green,blue,indigo,violet
as light enters prism, slows and refracted
amount changes by color because different wavelengths and freq
red longest wave, lowest freq, refracted less
opposite for violet
