red shift Flashcards
light from nearby star
appears white
wavelength of light emitted covers whole visible spectrum
light from distant galaxy (increased wavelength)
appear red (red end if spectrum) - red shift
red shift happens when…
galaxy is moving away at high speed (wavelengths stretched)
when light is emitted by a star, the light travel through…
- the gases which make up the star
- the gases absorb specific wavelengths of light (black lines ins spectrum)
faster a galaxy is moving…
the further away it is
so galaxies have different…
red shift (depending on the speed they’re moving away)
does spectrum from a star in our galaxy have red shift
no red shift
does spectrum from a star in another galaxy have red shift
some red shift
does spectrum from a star in a distant galaxy have red shift
a lot of red shift
red light has longer wavelength than…
blue light
red shift proves that…
the universe is expanding from the centre (supports Big Bang theory)
galaxies are moving…
away from a single centre point all at different speeds
we still do not understand…
dark matter and dark energy (matter which we can’t see)
